Answer:
(i) To find the actual area of the field represented on the map by a rectangle 6 cm long and 4 cm wide, we need to first convert the dimensions of the rectangle to actual units. Since the scale of the map is 1:20,000, this means that 1 cm on the map represents 20,000 cm in actuality.
The length of the rectangle on the map is 6 cm, so its actual length is:
6 cm x 20,000 cm/cm = 120,000 cm
Similarly, the width of the rectangle on the map is 4 cm, so its actual width is:
4 cm x 20,000 cm/cm = 80,000 cm
The actual area of the rectangle is then:
Actual area = actual length x actual width
Actual area = 120,000 cm x 80,000 cm
Actual area = 9,600,000,000 cm^2
Therefore, the actual area of the field represented on the map by a rectangle 6 cm long and 4 cm wide is 9,600,000,000 cm^2.
(ii) To convert the actual area to hectares, we need to divide by 10,000 m^2/ha, since 10,000 m^2 is equal to 1 hectare.
Actual area in hectares = (9,600,000,000 cm^2) / (10,000 m^2/ha)
Actual area in hectares = 960,000 m^2 / 10,000 m^2/ha
Actual area in hectares = 96 hectares
Therefore, the area of the field in hectares is 96 hectares.
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expand 3(x+6)
please help me on the eqation
Answer:
3x + 18
Step-by-step explanation:
3 ( x + 6 )
= 3*x + 3*6
= 3x + 18
Answer:
3x + 18
Step-by-step explanation:
expand 3(x+6)
3(x + 6) =
3 * x + 3 * 6
3x + 18
Use the graph to answer the question. Graph of a polygon ABCD with vertices at 6 comma 6, 14 comma 6, 14 comma 10, 6 comma 10 and a second polygon A prime B prime C prime D prime with vertices at 3 comma 3, 7 comma 3, 7 comma 5, 3 comma 5. Determine the scale factor used to create the image. one half 2 one fourth 4
Answer:
The scale factor is 1/2
Step-by-step explanation:
The ordinal length is 8 and the width is 4.
The image has a length of 4 and a width of 2.
Helping in the name of Jesus.
The scale factor is 1/2
What is scale factor?A scale factor is when you enlarge a shape and each side is multiplied by the same number. This number is called the scale factor. Maps use scale factors to represent the distance between two places accurately.
here, we have,
given that,
a polygon ABCD with vertices at 6 comma 6, 14 comma 6, 14 comma 10, 6 comma 10 and a second polygon A prime B prime C prime D prime with vertices at 3 comma 3, 7 comma 3, 7 comma 5, 3 comma 5.
so, we get,
The ordinal length is 8 and the width is 4.
and, we have,
The image has a length of 4 and a width of 2.
so, we get,
scale factor for length = 4/8
= 1/2
scale factor for width = 2/4
= 1/2
Hence, The scale factor is 1/2.
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ricky has 23 word hours each week to dedicate to his classes.Homework takes 6.5 hours and each class (c) is 1.5 hours long.How many classes does ricky take?
Ricky has 23-word hours each week to dedicate to his classes. Homework takes 6.5 hours and each class (c) is 1.5 hours long. Thus, 05 classes Ricky takes every week.
There are 60 minutes in 1 hour. To convert from minutes to hours, divide the number of minutes by 60. For example, 120 minutes equals 2 hours because 120/60 = 2.
According to the Question:
Let us consider
a = hour she dedicates to his classes = 6.5 hours
and
b = hours spend on homework= 1.5 hours
Total hours in a week devoted to his classes = 23/7
Therefore, 23/7 ×1.5
= 5 classes.
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pQRs is Rhombous '0' is the bisect of diagonal Qs and pR if p0=x or y-1 0Q=2x+7 and 0s =4y-5 what is value of x and y
Answer:
Step-by-step explanation:
PLEASE HELP!!! 50 points
As per the congruent angles' theorem, the angles ∠3=∠4.
What are congruent angles?Angles that are identical to one another are said to be congruent. As a result, these angles are proportionally equal to one another.
Angles can be acute, obtuse, exterior, or interior, and their shape has no bearing on whether they are congruent or not.
In the given triangle,
∠5 = ∠6
∠1 = ∠2 as the angles are opposite corresponding angles.
As two of the 3 angles are equal to each other.
So, ∠3=∠4.
The third angles are equivalent to each other as per the congruent angle theorem.
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At a parade 1/4 of the people have red hair, 1/6 of them have brown hair the rest of the people have black hair. What fraction of the people have black hair
A procession typically has one-fourth of the participants with red hair, one-sixth with brown hair, and the remaining participants with black hair. 7/12 of the population has black hair.
We are given that 1/4 of the people have red hair and 1/6 of them have brown hair.
Let's add these fractions together to find the fraction of people who have either red or brown hair:
[tex]\\\frac{1}{4} + \frac{1}{6}\\ =\frac{3+2}{12} \\ =\frac{5}{12}[/tex]
This means that 5/12 of the people have either red or brown hair.
Since the remaining people must have black hair, we can subtract this fraction from 1 to find the fraction of people who have black hair:
1 - 5/12
=12-5/12
= 7/12
Therefore, the fraction of people who have black hair is 7/12.
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What is 12 7/8 - 56/17?
12 7/8 - 56/17 = 1303/136
Company revenue quadratic function.
Angel
The revenue, in billions of dollars, for a company in the year 2002 was $2.7 billion. One year later, in 2003, the revenue had risen to $3.4 billion. In 2005, the revenue climbed to $3.9 billion, before falling to $2.7 billion in 2008. The revenue, r, in billions of dollars, for the company, is a quadratic function of the number of years since 2002, x. what is the vertex of the function?
To find the quadratic function that represents the revenue of the company as a function of the number of years since 2002, we can use the vertex form of a quadratic function:
r(x) = a(x - h)^2 + k
where a is the coefficient of the quadratic term, h is the x-coordinate of the vertex, and k is the y-coordinate of the vertex.
We can use the given revenue values to set up a system of three equations:
2.7 = a(0 - h)^2 + k
3.4 = a(1 - h)^2 + k
2.7 = a(6 - h)^2 + k
Subtracting the first equation from the second, and the first equation from the third, we get:
0.7 = a(1 - h)^2
0 = a(6 - h)^2
Since a cannot be zero (otherwise we wouldn't have a quadratic function), we can divide the second equation by the first to get:
6 - h = 10
which gives us h = -4.
Substituting h = -4 into the first equation, we get:
2.7 = a(0 - (-4))^2 + k
2.7 = 16a + k
Substituting the revenue value for 2005, we get:
3.9 = a(3 - (-4))^2 + k
3.9 = 49a + k
Solving for a and k, we get:
a = -0.1
k = 4.3
Therefore, the quadratic function that represents the revenue of the company as a function of the number of years since 2002 is:
r(x) = -0.1(x + 4)^2 + 4.3
The vertex of this function is at (-4, 4.3).
Angel
What is the sum of the numbers in the sequence 3, −4, 5, −6, . . . , 101?
We can notice that the sequence alternates between adding an odd number and subtracting an even number. The first term is 3, which is odd, so the sequence starts by adding an odd number. The second term is -4, which is even, so the sequence then subtracts an even number. This pattern continues, so the sum of the sequence can be written as:
3 - 4 + 5 - 6 + ... + 101
We can group the terms into pairs:
(3 - 4) + (5 - 6) + ... + (99 - 100) + 101
Each pair of terms adds up to -1, so we can simplify the expression to:
-1 -1 -1 ... -1 + 101
where there are 50 pairs of -1's. The sum of 50 -1's is -50, so the sum of the sequence is:
-50 + 101 = 51
Therefore, the sum of the numbers in the sequence 3, −4, 5, −6, . . . , 101 is 51.
Angel
What is 12 7/8 - 56/17?
To subtract mixed numbers like 12 7/8, we first need to convert it to an improper fraction. We can do this by multiplying the whole number by the denominator of the fraction, and adding the result to the numerator. This gives us:
12 7/8 = (12 × 8 + 7)/8 = 103/8
Now we can subtract 56/17 from 103/8. To do this, we need to find a common denominator for the two fractions. The least common multiple of 8 and 17 is 136, so we can rewrite the fractions with this denominator:
103/8 = (103/8) × (17/17) = 1751/136
56/17 = (56/17) × (8/8) = 448/136
Now we can subtract the two fractions:
1751/136 - 448/136 = (1751 - 448)/136 = 1303/136
We can simplify this fraction by finding a common factor to divide both the numerator and denominator. Since both 1303 and 136 are relatively prime, we cannot simplify it any further. Therefore, the final answer is:
12 7/8 - 56/17 = 1303/136
If 25 tapered pins can be machined from a steel rod 15 ft long, how many tapered pins can be made from a steel rod 9 ft long?
If 25 tapered pins are machined from a steel rod 15 ft long, then total 15 tapered pins can be made from a steel rod 9 ft long.
The unitary method is a method where you find the value of one unit and then find the value of the number of units you want. The formula for the units method is to find the value of a single unit and then multiply the value of the single unit by the number of units to get the desired value. We have specify that 25 tapered pins can be made up from a steel rod 15 ft long. Let 'x' represent the number of pins that can be made from 9 ft long steel rod. Now, using the unitary method,
number of pins machined from a 15 ft long steel rod = 25
number of pins machined from a 1 ft long steel rod = 25/15
So, number of pins machined from a 9 feet long steel rod, x = (25/15)×9
=> x = 3×5 = 15
Hence, required tapered pins made from a steel rod 9 ft long is equals to the 15 pins.
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3, 9, 15,.
Find the 45th term.
The 45th term of the sequence is 267.
The 45th term of a sequence can be calculated using the formula:
Tn = a + (n – 1)d
Where,
Tn = the nth term
a = the first term
n = the term position
d = the common difference
In this sequence, the first term is 3, the common difference is 6, and the term position is 45.
Therefore, the 45th term of the sequence is:
T45 = 3 + (45 – 1)6
T45 = 3 + (44)6
T45 = 3 + 264
T45 = 267
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HELP PLEASE!! ALSO IF U CAN PLEASE ANSWER MY RECENT QUESTIONS OF TODAY IF UR GENEROUS THANKS BAES
Answer:b
Step-by-step explanation:
just took the quiz
Explain how to find the diameter of a circle if you know the circumference.
If the value of C, the circumference is known, then the diameter is:
D = C/pi
How to get the diameter of the circle if you know the circumference?For a circle whose radius is R, the formula for the circumference is:
C = 2*pi*R
Where pi = 3.14
Particularly, we know that the diameter of a circle is twice the radius, os:
D = 2*R
We can rewrite the circumference equation to get:
C = pi*(2*R) = pi*D
So, solving that equation for the diameter, we will get:
D = C/pi
That equation gives the diameter if we know the value of the circumference.
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(-4,2) and (3,-3) what’s the slope
Answer:
7 over -5
Step-by-step explanation:
Which of the following direct variations has a constant of variation that is equal to -3? Click on the graph until the correct graph appears.
The graph given in this problem represents a proportional relationship with a constant of variation that is equals to -3.
What is a proportional relationship?A proportional relationship is a type of relationship between two quantities in which they maintain a constant ratio to each other. This means that if one quantity is multiplied by a certain factor, the other quantity will also be multiplied by the same factor.
The equation that defines the proportional relationship is given as follows:
y = kx.
In which k is the constant of proportionality, representing the increase in the output variable y when the constant variable x is increased by one.
For the graph given, when x increases by 1, y decays by 3, hence the constant is given as follows:
k = -3.
Then the equation is given as follows:
y = -3x.
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Four times the sum of 5 and some number is 20. What is the number?
Applying mathematical operations, "Four times the sum of 5 and some number is 20," the number is 0.
What are the mathematical operations?The mathematical operations include addition, subtraction, division, and multiplication.
Mathematical or algebraic operations use mathematical operands to manipulate values, variables, constants, and numbers to solve mathematical problems.
Is zero a number?Zero is considered to be a neutral number since it is neither positive nor positive.
Zero is important as a number placeholder.
4 (5 + x) = 20
20 + 4x = 20
4x = 20 - 20
4x = 0
x = 0
Thus, in the mathematical operations of multiplying the sum of 5 and some number by 4, the applicable number is zero.
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determine whether the following are price ceilings or price floors and whether they are binding/non-binding:
*equilibrium price of gas is $3/gallon
1. There are many teenagers who would like to work at gas stations, but they are not hired due to minimum-wage laws.
2. The government prohibits gas stations from selling gasoline for more than $2.70 per gallon.
3. The government has instituted a legal minimum price of $2.70 per gallon for gasoline.
1. This is an example of a minimum wage price floor.
2. This is an example of a price ceiling because it establishes a maximum price at which a gasoline station may sell gasoline.
3.This is an example of a price floor because it sets a minimum amount at which a gasoline station may sell gasoline.
Price Ceilings or Price Floors: A Determination
1. There are many teenagers who would like to work at gas stations, but they are not hired due to minimum-wage laws.
This is an example of a minimum wage price floor.
In a minimum wage, the government sets a minimum wage, and employers are unable to offer their employees less than that amount.
The minimum wage acts as a price floor because it establishes a minimum amount that an employer must pay.
2. The government prohibits gas stations from selling gasoline for more than $2.70 per gallon.
This is an example of a price ceiling because it establishes a maximum price at which a gasoline station may sell gasoline.
A price ceiling is a maximum amount that can be charged for a good or service.
3. The government has instituted a legal minimum price of $2.70 per gallon for gasoline.
This is an example of a price floor because it sets a minimum amount at which a gasoline station may sell gasoline.
A price floor establishes a minimum price that must be charged for a good or service in this scenario.
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There is a light pole that casts a shadow that is 75 feet. At the same time, there is a stop sign that is 8 feet tall and casts a shadow that is 12 feet. How tall is the light pole? If necessary, round your answer to the nearest tenth.
Answer: Therefore, the height of the light pole is 50 feet.
Step-by-step explanation:
We can use proportions to solve the problem.
Let h be the height of the light pole.
Then, we have:
h / 75 = 8 / 12
To solve for h, we can cross-multiply:
12h = 75 * 8
h = (75 * 8) / 12
h = 50
y= -6x - 43
y= -8x - 59
what is the answer to x and y. Please include step by step.
Step-by-step explanation:
Don't worry we will take care of everything. It's easy. listen carefully
first of all write your questions carefully.
i think it should be like this-
y= -6x +43 ------ (i)
y= -8x -59---------(ii)
1. We have two unknowns x and y. and two equations .
2. CONCEPT:- there are several ways to solve it like.
Elimination methodmultiplication methodsubstitution method ( we will go with this)ACCORDING TO SUBSTITUTION METHOD:-
Simply, write the equation in term of single variable(unknown). * [ which is already done for us]
second step, substitute the expression of obtained variable in any one equation.
example: substitute the value of y from equation (i) in (ii)
we will obtained equation -
=> y= -8x -59 [ put value of y from (i) ]
=> -6x +43 = -8x -59
(solve and find x)
=> -6x +8x = -59 - 43
=> 2x = -102
=> x = -51
Third step in substitute method is, now substitute this obtained value of x in any equation (i) or (ii) to get unknown y.
y will be = 349
* your questions was wrong so i have made it by myself. if this does not match your question sorry from my side. buti have shown you the concept to solve this type of questions. You will be able to solve this by your self now by applying concepts.
as the set designer for his school's fall play, kenji is making a treasure chest shaped like a rectangular prism. the chest needs to hold approximately 6 cubic feet, or 10,368 cubic inches, of sand that will be spilled out during the first act. also, since an actor will stand on the chest in the second act, the chest needs to be 24 inches tall. kenji decides that the chest will be twice as long as it is wide. to the nearest tenth of an inch, what is the width of the chest?
The width of the chest shaped like a rectangular prism, to the nearest tenth of an inch is 32.1.
Kenji has made a treasure chest, shaped like a rectangular prism that must hold around 10,368 cubic inches of sand. In the second act of the school play, an actor will stand on the chest.
Therefore, the chest must be 24 inches tall. The length of the chest is twice its width.
To determine the width of the chest, you should first determine the length of the chest.
Then, using the formula for the volume of a rectangular prism, you can solve for the width of the chest.
Length of the chest
The formula for the volume of a rectangular prism is V = lwh
Given that the chest needs to hold around 10,368 cubic inches of sand, we can write 10,368 = lwh
Since the chest is twice as long as it is wide, the length (l) of the chest is equal to 2w.
Substituting 2w for l, we have:
10,368 = (2w)w
hence 5,184 = wh²(5,184/h)
= w*h(5,184/h²) = w
Since the chest must also be 24 inches tall, we can write:
h = 24 feet
Substituting this value into the equation, we have:
(5,184/24²) = w
hence w = 32.1 inches
Therefore, the width of the chest to the nearest tenth of an inch is 32.1 inches.
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Can someone answer this question, please? Thanks!
Answer:
m>22 and m[tex]\leq[/tex]34
Step-by-step explanation:
The measures of the angles of a triangle are shown in the figure below. Solve for x.
36°
(6x+3)°
87°
Answer:
Step-by-step explanation:The sum of the measures of the angles in a triangle is always 180 degrees. So, we can set up an equation and solve for x:
36 + (6x+3) + 87 = 180
Combine like terms:
126 + 6x = 180
Subtract 126 from both sides:
6x = 54
Divide both sides by 6:
x = 9
Therefore, the value of x is 9.
Zahra is 4/5 as tall as Zayden. Zayden is 3/5 as tall as Eric. Eric is how many times as tall as Zahra?
Answer:
1/5 is the right answer in my opinion but I'm not sure
A chess club with 80 members is electing a new president. Teresa received 60 votes. What percentage of the club members voted for Teresa?
Answer:
75%
Step-by-step explanation:
Assume Teresa can vote for herself. 60/80=3/4=75%
Rashaad leans a 16-foot ladder against a wall so that it forms an angle of 66° with the ground. what's the horizontal distance between the base of the ladder and the wall?
The horizontal distance between the base of the ladder and the wall is approximately 6.58 feet
We can use trigonometric function to solve this problem. Let's call the horizontal distance we are looking for "x".
First, we can use the fact that the ladder forms an angle of 66° with the ground to find the vertical height it reaches. We know that the ladder is 16 feet long, and we can use the sine function to find the vertical height
sin(66°) = height/16
height = 16×sin(66°) = 15.12 feet (rounded to two decimal places)
Now, we can use the same angle and the cosine function to find the horizontal distance x
cos(66°) = x/16
x = 16×cos(66°) = 6.58 feet (rounded to two decimal places)
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40% of the people in a town are females. 10% of the females are left -handed. 20. 8% of all the people are left -handed. Work out the percentage of the people who are not female who are left -handed
Answer:
16.8%
Step-by-step explanation:
When fourty percentage of the people in a town are females. 10% of the females are left -handed. Then total 16.8% of peoples in the town are not female and are left-handed.
We have a percentage data of people in a town. Percentage of female peoples in the town = 40 %
Percentage of female left handed = 10 %
Percentage of total left handed = 20.8 %
Percentage is defined as a ratio of a number to 100 or it expressed as a fraction of 100. Let Total population of the town = X
So, female peoples in the town = 40% of X = (40/100) × X
= 0.4X
The peoples who are not female = X - 0.4X = 0.96X
Number of female left-handed = 10% of 0.4X = (10/100)× 0.4X
= 0.04X
Number of all left-handed in the town
= 20.8% of X = (208/100)× X
= 0.208X
Left-handed peoples who are not female
= 0.208X - 0.04X
= 0.168X
The percentage of people who are not female and who are left-handed
= (0.168X /X )×100
= 16.8%
Hence, required percentage is 16.8%.
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(a) Find the intervals on which f is increasing or decreasing. (b) Find the local maximum and minimum values of f. (c) Find the intervals of concavity and inflection points.
f(x)= x^4-2x^2+3
Part (c) is where I'm having issues on how to derive the second derivative f'(x)=4x(x-1)(x+1)
can you please show all steps.
The inflection points are at x = -[tex]\sqrt{(1/3)}[/tex] and x = sqrt(1/3), and f is concave up on (-[tex]\sqrt{1/3}[/tex]), [tex]\sqrt{(1/3)}[/tex]), and concave down elsewhere.
(a) To find the intervals on which f is increasing or decreasing, we need to find the first derivative of f and determine its sign.
[tex]f(x) = x^4 - 2x^2 + 3[/tex]
[tex]f'(x) = 4x^3 - 4x[/tex]
Setting f'(x) = 0, we get:
[tex]4x(x^2 - 1) = 0[/tex]
This equation has roots at x = 0, x = -1, and x = 1. We can use the first derivative test to determine the intervals of increasing and decreasing.
When x < -1, f'(x) is negative, so f is decreasing.
When -1 < x < 0, f'(x) is positive, so f is increasing.
When 0 < x < 1, f'(x) is negative, so f is decreasing.
When x > 1, f'(x) is positive, so f is increasing.
Therefore, f is decreasing on (-∞, -1) and (0, 1), and increasing on (-1, 0) and (1, ∞).
(b) To find the local maximum and minimum values of f, we need to look for critical points and evaluate the function at those points.
Critical points occur where f'(x) = 0 or is undefined. We have already found that f'(x) = 0 at x = 0, x = -1, and x = 1.
f(0) = 3, f(-1) = 6, f(1) = 2
Therefore, f has a local maximum at x = -1, with a value of 6, and local minimums at x = 0 and x = 1, with values of 3 and 2, respectively.
(c) To find the intervals of concavity and inflection points, we need to find the second derivative of f and determine its sign.
[tex]f(x) = x^4 - 2x^2 + 3[/tex]
[tex]f'(x) = 4x^3 - 4x[/tex]
[tex]f''(x) = 12x^2 - 4[/tex]
Setting f''(x) = 0, we get:
[tex]12x^2 - 4 = 0[/tex]
[tex]x^2 = 1/3[/tex]
x = ±sqrt(1/3)
We can use the second derivative test to determine the intervals of concavity.
When x < -sqrt(1/3), f''(x) is negative, so f is concave down.
When -sqrt(1/3) < x < sqrt(1/3), f''(x) is positive, so f is concave up.
When x > sqrt(1/3), f''(x) is negative, so f is concave down.
Therefore, the inflection points are at x = -sqrt(1/3) and x = sqrt(1/3), and f is concave up on (-sqrt(1/3), sqrt(1/3)), and concave down elsewhere.
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Find the value of k such that the line through (6, 4) and (k,2) is parallel to the line y=2x .
the value of k such that the line through (6, 4) and (k, 2) is parallel to the line y = 2x is k = 5.
How to solve the question ?
To find the value of k such that the line through (6, 4) and (k, 2) is parallel to the line y = 2x, we need to find the slope of the line y = 2x, which is 2.
Since two lines are parallel if and only if they have the same slope, we know that the line through (6, 4) and (k, 2) must also have a slope of 2.
Using the slope formula:
slope = (y₂ - y₁) / (x₂ - x₁)
where (x₁, y₁) = (6, 4) and (x₂, y₂) = (k, 2), we get:
2 = (2 - 4) / (k - 6)
Multiplying both sides by k - 6 gives:
2(k - 6) = -2
Expanding and simplifying gives:
2k - 12 = -2
Adding 12 to both sides gives:
2k = 10
Dividing both sides by 2 gives:
k = 5
Therefore, the value of k such that the line through (6, 4) and (k, 2) is parallel to the line y = 2x is k = 5.
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Anna Has d dimes Brittany has 4 times as many dimes as Anna has write and expression for the total number of dimes Anna and Brittany have them simplify the expression
The expression represent total number dime both have is 5d.
What is expression?Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Unknown variables, integers, and arithmetic operators are the components of an algebraic expression. There are no symbols for equality or inequality in it.
Here Anna Has d dimes and Brittany has 4 times as many dimes as Anna.
Then,
Number of dime Anna has = d Number of dime Brittany has = 4d
Now the total number of dimes both have is:
Total dimes = d+4d
= 5d
Hence the expression represent total number dime both have is 5d.
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Central Park is a rectangular park in New York City. Use the provided ruler to answer the following questions. a. Find the perimeter and the area of Central Park in the scale drawing. Round your measurements for the length and the width to the nearest half centimeter to calculate your answers. The perimeter in the scale drawing is centimeters. The area in the scale drawing is square centimeters. b. Find the actual perimeter and area of Central Park. The actual perimeter is meters. The actual area is square meters.
For the rectangle shaped drawing, the area of the scale drawing is 31.25 cm².
What exactly is a rectangle?
A rectangle is a four-sided flat form with four right angles on its four sides (90-degree angles). It is a quadrilateral having two pairs of equal-length parallel sides. A rectangle's perimeter is the total of the lengths of all four sides, and its area is derived by multiplying the rectangle's length and breadth. A square is a specific instance of a rectangle with four equal-length sides.
Now,
To find the perimeter of the scale drawing, we add the lengths of all four sides. Rounded to the nearest half centimeter, the length is 12.5 cm and the width is 2.5 cm, so the perimeter is:
P = 2(12.5 cm) + 2(2.5 cm) = 25 cm + 5 cm = 30 cm
Therefore, the perimeter of the scale drawing is 30 centimeters.
To find the area of the scale drawing, we multiply the length by the width. Rounded to the nearest half centimeter, the length is 12.5 cm and the width is 2.5 cm, so the area is:
A = (12.5 cm) × (2.5 cm) = 31.25 cm²
Therefore, the area of the scale drawing is 31.25 square centimeters.
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Correct Question :-
Central Park is a rectangular park in New York City. A map of Central Park in New York City. The measured length is 12.5 centimeters. The measured width is 2.5 centimeters. Find the perimeter and the area of the scale drawing of Central Park. Round your measurements for the length and the width to the nearest half centimeter to calculate your answers.
simplify (1/2)³x(1/2)² and write in exponential form
Answer:
To simplify (1/2)³x(1/2)², we can multiply the coefficients and add the exponents with the same base:
(1/2)³x(1/2)² = (1/2)^(3+2) = (1/2)^5
Therefore, (1/2)³x(1/2)² simplified is equal to (1/2)^5, which can also be written as 1/32 in fraction form.
Step-by-step explanation:
In order to multiply we use the formula for indices' multiplication that is
[tex] {n}^{a} \times {n}^{b} = {n}^{a + b} [/tex]
Hence,
[tex]{( \frac{1}{2} )}^{3}( { \frac{1}{2}}^{2}) = {( \frac{1}{2} )}^{5} [/tex]
[tex] ( \frac{{1}^{5} }{{2}^{5} } ) = {2}^{ - 5} [/tex]
safety information about a ladder indicates that a ladder should not be set up at an angle less than 45 degrees or at an angle greater than 75 degrees. What range of height can a 20-foot ladder reach?
According to the question the height of the ladder is 34.641 feet, or approximately 19.98 feet.
What is height?Height is the measure of vertical distance, either how "tall" something or someone is, or the distance between the top and bottom of an object. It is measured in either centimeters, meters, or feet and inches, and can be used to describe the elevation of land or the altitude of an aircraft.
Let x be the height of the ladder.
For a 20-foot ladder at an angle of 45°, we have the following trigonometric equation:
tan(45°) = x/20
Solving for x we get:
x = 20tan(45°)
x = 20 × 1
x = 20
Therefore, the height of the ladder is 20 feet.
For a 20-foot ladder at an angle of 75°, we have the following trigonometric equation:
tan(75°) = x/20
Solving for x we get:
x = 20tan(75°)
x = 20 × 1.73205
x = 34.641
Therefore, the height of the ladder is 34.641 feet, or approximately 19.98 feet.
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The range of height can be determined by trigonometric ratios and the rage is 20ft to 74.6 ft(approximately).
What is Trigonometric Ratios?
Trigonometric Ratios are based on the value of the ratio of sides of a right-angled triangle where Hypotenuse is the longest side Perpendicular is opposite side to the angle and Base is the Adjacent side to the angle. The ratios of these three sides of a right-angled triangle with respect to any of its acute angles are known as the trigonometric ratios of that particular angle.
Given that a ladder should not be set up at an angle less than 45 degrees or at an angle greater than 75 degrees.
The ladder is 20 foot.
here the trigonometric function tangent will be used.
By the formula, tan Ф = Perpendicular/ adjacent side [ where Ф is the acute angle]
Let, the height of the ladder is x foot.
Then by formula of trigonometric ratio,
tan 45° = x/20
⇒ x/20 =1 [ since tan 45° =1 ]
⇒ x= 20
Again,
tan 75° = x/ 20
⇒ x= 20× tan 75°
⇒ x= 74.6 [ since tan 75° = 3.732]
Hence, the range of height is 20 foot to 74.6 foot ( approx ).
The rough diagram is attached below.
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