The theoretical probability of tossing two heads when tossing a pair of coins is 0.25. When the pair of coins was tossed 20 times, two heads came up only 2 times. Which procedure would result in an experimental probability that is closer to the theoretical probability?
toss the coins more than 20 times
toss the coins fewer than 20 times
count only those tosses that result in two heads or two tails
toss three coins instead of two coins

I think we need to (4 divided by 5)+2

4 divided by 5= 0.8

0.8+2

=2.8

answer: 2.8

the probability that both drivers are wearing their seatbelts is 0.64, or 64%.

P(A and B) = P(A) x P(B|A)

The probability of both drivers wearing seatbelts can be calculated as follows, assuming that one driver's use of a seatbelt has no effect on the other driver's use of a seatbelt and that the probability of a driver wearing a seatbelt is independent of the other driver:

Let P(S) be the probability that a driver wears a seatbelt, then P(not S) is the probability that a driver does not wear a seatbelt.

Given that 4 out of every 5 drivers wear seatbelts, we have P(S) = 4/5 = 0.8 and P(not S) = 1 - P(S) = 1 - 0.8 = 0.2.

Let A be the event that the first driver wears a seatbelt, and B be the event that the second driver wears a seatbelt. We need to find the probability of both A and B occurring, which is denoted as P(A and B).

he probability of the first driver wearing a seatbelt is P(A) = P(S) = 0.8,

and the probability of the second driver wearing a seatbelt given that the first driver is wearing a seatbelt is P(B|A) = P(S) = 0.8 because the two drivers are stopped at random.

Using the multiplication rule for independent events, we have:

P(A and B) = P(A) x P(B|A)

= 0.8 x 0.8

= 0.64

Therefore, the probability that both drivers are wearing their seatbelts is 0.64, or 64%.

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T3=R1

T4=R2}==>TUR=TSR

RT=RT

so: S=U

Therefore, the coordinates of A are (1, 3) and (2, 4). Therefore, the area of the shaded region is (1/2) square units.

In mathematics, area is the measure of the amount of surface enclosed by a two-dimensional shape or object. It is the size of a surface, and is typically measured in square units such as square meters (m²), square centimeters (cm²), square feet (ft²), or square inches (in²).

Here,

First, we need to find the coordinates of the point where the line and the curve meet (point A).

Substituting y = x(4 – x) into y + 2x = 5, we get:

x(4 – x) + 2x = 5

Simplifying and rearranging, we get:

x² – 3x + 2 = 0

Factoring, we get:

(x – 1)(x – 2) = 0

Therefore, x = 1 or x = 2.

When x = 1, y = 3, and when x = 2, y = 4. Therefore, the coordinates of A are (1, 3) and (2, 4).

To find the area of the shaded region, we need to find the integral of the curve y = x(4 – x) between x = 1 and x = 2, and subtract the area under the line y + 2x = 5 between the same limits.

The equation y + 2x = 5 can be rewritten as y = -2x + 5.

Integrating y = x(4 – x) between x = 1 and x = 2, we get:

∫(1 to 2) x(4 – x) dx = (8/3) – (2/3)

= 2

Integrating y = -2x + 5 between x = 1 and x = 2, we get:

∫(1 to 2) (-2x + 5) dx = (3/2)

Therefore, the area of the shaded region is:

=2 - (3/2)

= (1/2) square units

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The surface area of a cylinder is given by the formula:

A = 2πrh + 2π[tex]r^{2}[/tex]= 2*3.14*4.8*19.1= 575.504 square ft.

Surface area is the measure of the total area that the surface of an object occupies. It is the sum of all the areas of the individual faces or surfaces of the object. For example, if you have a cube, the surface area would be the sum of the areas of all six faces of the cube. The surface area is usually measured in square units, such as square meters, square centimeters, or square feet, depending on the system of measurement used. Surface area is an important concept in many fields of study, including mathematics, physics, chemistry, and engineering.

by the question.

The surfaces area of a cylinder is given by the formula:

[tex]A = 2πrh + 2πr^2[/tex]

where r is the radius of the circular base of the cylinder, and h is the height of the cylinder.

If a=9.6ft and b=19.1ft, we need to determine the values of r and h before we can calculate the surface area.

Since the cylinder has a circular base, we know that the diameter of the base is equal to b, or 19.1ft. Therefore, the radius of the base is half the diameter, or:

r = b/2 = 19.1/2 = 9.55ft

we know that the radius of the cylinder is = diameter/2

= 9.6/2

= 4.8

The surfaces area of a cylinder= [tex]A = 2πrh + 2πr^2[/tex]

A = 2πrh + 2π[tex]r^{2}[/tex]= 2*3.14*4.8*19.1= 575.504 square ft.

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A. The mean age of the team rounded to 1 decimal place is 20.9 years

B. The age of the new player is 23.1 years

The mean age of the team can be obtained as illustrated below:

Mean age = ∑fx / ∑f

Mean age = [(19 × 2) + (20 × 3) + (21 × 1) + (22 × 4) + (23 × 1)] / (2 + 3 + 1 + 4 + 1)

Mean age = 230 / 11

Mean age = 20.9 years

Thus, the mean age of the team is 20.9 years

The age of the new player can be obtained as follow:

New mean = (mean of previous + age of new player) / 2

22 = (20.9 + age of new player) / 2

Cross multiply

22 × 2 = 20.9 + age of new player

44 = 20.9 + age of new player

Collect like terms

44 - 20.9 = Age of new player

Age of new player = 23.1 years

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Complete question:

Pleas attached photo

Answer:

2

Step-by-step explanation:

Both 8 and 1/32 are powers of 2.

2³ is 8, since 2*2*2=8.

2^-5 is 1/32.

2^5 is 2*2*2*2*2, and the negative sign in front of the 5 flips the answer to be 1/32

The equatiοn οf the circle will be [tex]x^{2}+y^{2} -6x-16=0[/tex]

A clοsed rοund shaped figure which cοntains nο cοrners is called circle. It has center called (h, k)  and radius r. Rοund clοck, car tire, wheels are the examples οf circle.

If the center and radius is given then the equatiοn οf circle is:

[tex](x-h)^{2} + (y-k)^{2} = r^{2}[/tex] ------------- (1) where (h, k) centre and r radius.

Here center οf the circle is (3,0) and radius οf the circle is 5

putting h= 3 , y=0  and r=5 in equatiοn (1) we get

    [tex](x-3)^{2} + (y-0)^{2} =5^{2}[/tex]

⇒ (x²- 6x+9) +y²=25

⇒ x²+y²-6x+9-25=0

⇒x²+y²-6x-16=0

Hence the equatiοn οf circle is x²+y²-6x-16=0.

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The domain of this function can be expressed as (-∞,0) U (0,∞).

The interval on which the function is decreasing is

(-∞,0) U (0,∞).

The interval on which the function is increasing is none.

The interval on which the function is constant is (0,0).

The domain of a function is the set of all acceptable inputs for the function. In other words, it is the set of all values for which the function is defined.

The domain of the given function is all real numbers, excluding 0.

This can be seen by observing that the denominator in the fraction is the absolute value of t, which is always positive.

Therefore, the domain of the function is all real numbers except 0, which can be expressed as (-∞,0) U (0,∞).

The function is decreasing over all intervals in its domain since the negative sign preceding the fraction indicates that the value of the function is always negative.

Therefore, the interval on which the function is decreasing is

(-∞,0) U (0,∞).

The function is constant over the interval (0,0) since the absolute value of 0 is 0 and thus, the denominator in the fraction is equal to 0.

Therefore, the interval on which the function is constant is (0,0).

Finally, the function is not increasing over any interval in its domain since the negative sign preceding the fraction indicates that the value of the function is always negative.

Therefore, the interval on which the function is increasing is none.

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The equation, (x - 10)² + (y - 5)² = 144, represents a circle with center (10, 5) and radius 12.

From the question, we are to determine the center and radius of the circle represented by the given equation

From the given information, the given equation is

(x - 10)² + (y - 5)²= 144

To determine the center and the radius of the circle we will compare the given equation to the standard form of the equation of a circle:

(x - h)² + (y - k)² = r²

where (h, k) is the center of the circle and r is the radius.

The equation

(x - 10)² + (y - 5)²= 144

can be written as

(x - 10)² + (y - 5)²= 12²

By comparison,

h = 10, k = 5 and r = 12

Hence, the center of the circle is (10, 5) and the radius is 12

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Answer:

NO

Step-by-step explanation:

First, we should simplify both fractions to the most simple form.

4/14=2/7

12/40=6/20=3/10

A proportion means that it is equal. 2/7 does not equal 3/10, so the answer is no.

The approximate percentage that the price of the computer was reduced is 12.5%.

A number can be expressed as a fraction of 100 using a percentage. The letter "%" stands for it. We may compare numbers of various sizes quickly and efficiently using percentages to compare a quantity to its entire or total.

To find the approximate percentage that the price of the computer was reduced, we can use the following formula:

percentage decrease = (original price - new price) / original price x 100%

Substituting the given values, we get:

percentage decrease = (399 - 349) / 399 x 100%

percentage decrease = 50 / 399 x 100%

percentage decrease ≈ 12.5%

Therefore, the approximate percentage that the price of the computer was reduced is 12.5%.

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Answer:

The constant of variation in the given problem is 9.8

GIVEN

w = 2,116.8

m = 120

h = 1.8

SOLUTION

w=kmh

2116.8 = k(120)(1.8)

2116.8=216k

9.8=k

Answer:3.14sq^2

Step-by-step explanation:b x c x a = 3.14

The axis of symmetry of the function h(x) is x = 5. So, option D is correct.

The axis of symmetry of a quadratic function is a vertical line that divides the parabola into two symmetric parts. The axis of symmetry is always a vertical line passing through the vertex of the parabola.

In algebraic terms, the axis of symmetry of a quadratic function of the form [tex]f(x) = ax^2 + bx + c[/tex] is given by the equation:

[tex]x = -\frac{b}{2a}[/tex]

Where a and b are the coefficients of the quadratic expression.

Let's consider the given question:

To find the axis of symmetry of the quadratic function [tex]h(x) = 6x^2 - 60x + 147[/tex], we can use the formula [tex]x = -\frac{b}{2a}[/tex], where a and b are the coefficients of the quadratic expression.

In this case, a = 6 and b = -60, so the axis of symmetry is:

[tex]x = -\frac{(-60)}{2*(6)}[/tex]

[tex]x = 5[/tex].

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Answer: 21 cups of sugar, 7 cakes

Solve the following proportion:

3/5=x/35

Cross multiply:

5x=35(3)

5x=105

x=21 cups of sugar

3 cups of sugar= 1 cake

21 cups of sugar= x cakes

Cross multiply:

3x=21

21/3

7 cakes

Answer: required ratio is 1;3

Step-by-step explanation:

Since we have given that

Ratio of the number of 5 p coins to the number of 10 p coins = 2:3

So, the number of 5p coins be '2x'

Let the number of 10p coins be '3x'.

Value of 5p coins = 5p x 2x =10px

Value of 10p coins = = 10p x 3px=30px

So, the ratio of value of 5p coins to the value of 10p coins is given by

10px:30px

1:3

Answer:

First, we need to find the area of one block:

Area of one block = length x width = (1/10) mile x (1/10) mile = 1/100 square mile

Since there are 500 blocks in the town, the total area of the town is:

Total area of town = 500 blocks x (1/100) square mile/block = 5 square miles

To find the population density, we divide the population by the total area:

Population density = population / total area

Population density = 80,250 / 5 = 16,050 people per square mile

Therefore, the population density of the town is 16,050 people per square mile.

the area of the equilateral triangle with a side length of 15 is approximately 97.4279 square units.

A regular triangle is also known as an equilateral triangle, which means all of its sides are equal in length. To find the area of an equilateral triangle with a side length of 15, we can use the following formula:

Area = (√(3) / 4) × side²

where "side" is the length of one side of the triangle.

Let's plug in the given value of side length, which is 15, into the formula:

Area = (√(3) / 4) × 15²

Area = (√(3) / 4) × 225

Area = 97.4279 (rounded to 4 decimal places)

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Number of ways that the researcher can select 4 boxes, consisting of 2 boxes of regular and 2 boxes of diet, for a quality control test is 441

To select 4 boxes consisting of 2 regular and 2 diet from 7 boxes of each, we need to use combinations.

The number of ways to select 2 regular boxes out of 7 is

C(7,2) = 21

Similarly, the number of ways to select 2 diet boxes out of 7 is also 21.

Now we need to choose 2 regular boxes out of 2 and 2 diet boxes out of 2, which can only be done in one way.

So the total number of ways to select 4 boxes consisting of 2 regular and 2 diet is

21 x 21 x 1 x 1 = 441

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The exact value of x is 12.97.

In geometry, a bisector refers to a line or plane that divides a geometric figure into two equal parts. Specifically, a bisector divides an angle into two equal angles, a line segment into two equal parts, or a plane figure into two equal areas.

There are two types of bisectors:

Angle bisector: A line or ray that divides an angle into two equal angles is called an angle bisector. The point where the bisector intersects the angle is known as the vertex of the angle.

Segment bisector: A line, ray, or line segment that divides a line segment into two equal parts is called a segment bisector. The point where the bisector intersects the line segment is known as the midpoint of the line segment.

We can use the angle bisector theorem to find the value of x. According to the angle bisector theorem, the length of the segment bisecting an angle in a triangle is proportional to the lengths of the two sides adjacent to that angle.

Let's call the point where ST intersects QS point U. Then, by the angle bisector theorem, we have:

QU / QR = SU / SR

Substituting the given values, we get:

QU / 20 = x / 16

Multiplying both sides by 20, we get:

QU = (20x) / 16 = (5x) / 4

Similarly, we have:

SU / QS = TU / TR

Substituting the given values and simplifying, we get:

SU / 12 = x / 20

Multiplying both sides by 12, we get:

SU = (12x) / 20 = (3x) / 5

Now, we can use the fact that QRS is a triangle to find the remaining side length:

QR + RS = QS

20 + 16 = 12 + SU + QU

36 = 12 + (3x/5) + (5x/4)

Multiplying both sides by 20, we get:

720 = 240 + 12x + 25x

720 = 37x + 240

37x = 480

x = 480/37

So the value of x is approximately 12.97 (rounded to the nearest hundredth).

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Answer:

a. 250,000

b. 450,000

Step-by-step explanation:

the correct answer is a. SAS congruency theorem can be used to prove that ABD =DCA.

In this question we accept two angles is given that is:

two triangles ∠ABD and

In this, an angle is common that is,

AD = AD

AB = CD

∠A is equal = ∠A (which is given)

That is the reason the SAS rule is right.

SSS is a geometric term that stands for "side-side-side." It refers to a congruence condition in which three sides of one triangle are equal to three corresponding sides of another triangle, making the two triangles congruent. Congruent triangles have the same size and shape, so if two triangles are congruent, all corresponding angles and sides are equal.

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the complete question is:

Which congruency theorem can be used to prove

that ABD =DCA?

a. SAS

b. Not enough information

c. SSS

d. AAS

3.a. The slope of the line is -2.

b. The y-intercept of the line is 17.

c. The equation of the line is y=-2x+17.

4. The correlation coefficient is -2.

5. When the number of losses is 20, the week is 6.

6. When the week is 15, the number of losses is -13.

It is calculated by dividing the vertical change (rise) between two points by the horizontal change (run) between the same two points.

3.a. The slope of the line is -2.

This can be determined by calculating the change in the y-values

(15-12=3,

12-10=2,

10-7=3,

7-6=1,

6-3=3,

and 3-1=2)

and dividing by the change in the x-values

(1-2=-1,

2-3=-1,

3-4=-1,

4-5=-1,

5-6=-1,

and 6-7=-1),

which gives us (3+2+3+1+3+2)/-6=-2.33=-2

b. The y-intercept of the line is 17.

This can be determined by finding the y-value when x=0.

Since there is no x=0 value in the table, we can use the equation of the line to calculate the y-value when x=0.

When x=0, y=17.

c. The equation of the line is y=-2x+17.

4. The coefficient of correlation is -2.

This can be determined by using the slope of the line, which is -2.

The coefficient of correlation is equal to the slope of the line, which is -2.

5. When the number of losses is 20, the week is 6.

This can be determined by using the equation of the line and solving for x when y=20.

When y=20,

-2x+17=20,

so 2x=3 and x=3/2, which is 6 weeks.

6. When the week is 15, the number of losses is -13.

This can be determined by using the equation of the line and solving for y when x=15.

When x=15,

y=-2(15)+17

=-13.

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The probability that a randomly selected athlete uses a stair climber for,

(a) P(X < 18) = 0.2514

(b) P(22 < X < 31) = 0.4332

(c) P(X > 30) = 0.0918

Let X be the amount of time an athlete uses a stair climber. Then, X ~ N(22, 6^2) represents a normal distribution with mean 22 and standard deviation 6.

(a) To find the probability that a randomly selected athlete uses a stair climber for less than 18 minutes, we need to calculate P(X < 18).

Z-score for 18 minutes = (18 - 22) / 6 = -0.67

Using a standard normal table or calculator, we find that P(Z < -0.67) = 0.2514.

Therefore, P(X < 18) = P(Z < -0.67) = 0.2514.

(b) To find the probability that a randomly selected athlete uses a stair climber for between 22 and 31 minutes, we need to calculate P(22 < X < 31).

Z-score for 22 minutes = (22 - 22) / 6 = 0

Z-score for 31 minutes = (31 - 22) / 6 = 1.5

Using a standard normal table or calculator, we find that P(0 < Z < 1.5) = 0.4332.

Therefore, P(22 < X < 31) = P(0 < Z < 1.5) = 0.4332.

(c) To find the probability that a randomly selected athlete uses a stair climber for more than 30 minutes, we need to calculate P(X > 30).

Z-score for 30 minutes = (30 - 22) / 6 = 1.33

Using a standard normal table or calculator, we find that P(Z > 1.33) = 0.0918.

Therefore, P(X > 30) = P(Z > 1.33) = 0.0918.

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Answer:

[tex]85 + 8h = 125[/tex]

Check the picture below.

[tex]\sin(43^o )=\cfrac{\stackrel{opposite}{y}}{\underset{hypotenuse}{18}}\implies 18\sin(43^o )=y\implies 12.28\approx y[/tex]

Make sure your calculator is in Degree mode.

Answer:

$217.99

Step-by-step explanation:

To calculate your electricity bill, you need to multiply the number of kilowatt-hours (kWh) used by the rate per kWh.

Using the given information:

Number of kWh used = 2205

Rate per kWh = $0.09884

To calculate the bill:

Bill = Number of kWh used x Rate per kWh

= 2205 kWh x $0.09884/kWh

= $217.99

Therefore, your electricity bill would be $217.99 if you used 2205 kWh at a rate of $0.09884 per kWh.

Answer:

To calculate your bill for using 2205 kWh of electricity at a rate of $.09884 per kWh, you can use the following formula:

Bill = kWh used x Rate per kWh

Plugging in the values given, we get:

Bill = 2205 x 0.09884

Simplifying the calculation, we get:

Bill = 217.5354

Rounding to two decimal places, the bill would be $217.54.

Hope This Helps!

Ms. Maynard grates 23/30 of a block of cheese, leaving the fraction of 7/30 of the cheese. Mr. Connor then eats 3/30 of the cheese, leaving the fraction of 4/30 of the cheese remaining.

Let us suppose the total block of cheese as 1.

If Ms. Maynard grates 23/30 of a block of cheese, then the fraction of cheese left is:

Remaining cheese = 1 - 23/30 = 7/30

After Mr. Connor eats 3/30 of the cheese, the fraction of cheese left is:

Remaining cheese = 7/30 - 3/30 = 4/30

Therefore, 4/30 of the cheese is left over after grating by  Ms. Maynard and  Mr. Connor respectively.

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