Researcher are recording how much of an experimental medication is in a person’s bloodstream every hour. they discover that half-life of the medication is about 6 hours.

Answer:

179.3 square units

Step-by-step explanation:

We have to find the area of the rectangle and area of semicircle using the formula and then add the areas.

Area of rectangle:

                  length = 14 units

                   width = 10 units

          [tex]\sf \boxed{\text{\bf Area of rectangle = length * width}}[/tex]

                                             = 14 * 10

                                             = 140 square units

Area of semicircle:

                diameter of semicircle = width of the rectangle

                                                 d =  10 units

                                                 r = d ÷ 2

                                                    = 10 ÷ 2

                                                    = 5 units

                     [tex]\boxed{\text{\bf Area of semicircle = $\dfrac{1}{2}\pi r^2$}}[/tex]

                                                       [tex]\sf = \dfrac{1}{2}*3.14*5*5\\\\ = 39.26\\\\ = 39.3 \ square \ units[/tex]

Area of the figure = area of rectangle +  area of semicircle

                             = 140 + 39.3

                             = 179.3 square units

The expression in terms of π that represents the area of the shaded part of ⊙R is 3πR²/4, obtained by subtracting the area of the smaller circle from the larger circle.

To find the area of circle of the shaded part of ⊙R, we need to subtract the area of the smaller circle from the area of the larger circle.

The area of a circle is given by the formula A = πr², where r is the radius of the circle.

Let the radius of the larger circle be R and the radius of the smaller circle be r. Then the area of the shaded part can be expressed as:

A(shaded) = A(large circle) - A(small circle)

= πR² - πr²

We can simplify this expression further by noticing that the radius of the smaller circle is half the radius of the larger circle, so r = R/2. Substituting this into the equation gives:

A(shaded) = πR² - π(R/2)²

= πR² - πR²/4

= 3πR²/4

Therefore, the area of the shaded part of ⊙R can be expressed as 3πR²/4. This expression represents the difference in the area between the larger and smaller circles, which gives us the area of the shaded region.

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The expression in terms of π that represents the area of the shaded part of ⊙R is 3πR²/4, obtained by subtracting the area of the smaller circle from the larger circle.

To find the area of circle of the shaded part of ⊙R, we need to subtract the area of the smaller circle from the area of the larger circle.

The area of a circle is given by the formula A = πr², where r is the radius of the circle.

Let the radius of the larger circle be R and the radius of the smaller circle be r. Then the area of the shaded part can be expressed as:

A(shaded) = A(large circle) - A(small circle)

= πR² - πr²

We can simplify this expression further by noticing that the radius of the smaller circle is half the radius of the larger circle, so r = R/2. Substituting this into the equation gives:

A(shaded) = πR² - π(R/2)²

= πR² - πR²/4

= 3πR²/4

Therefore, the area of the shaded part of ⊙R can be expressed as 3πR²/4. This expression represents the difference in the area between the larger and smaller circles, which gives us the area of the shaded region.

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Answer:

10.24 gallons

$276.48

Step-by-step explanation:

The area of the wall can be calculated by multiplying the length and height of the wall:

Area of wall = length x height = 32 x 16 = 512 square feet

To calculate the number of gallons of paint needed, we need to divide the area of the wall by the coverage of one gallon of paint:

Number of gallons of paint = Area of wall / Coverage of one gallon of paint

Number of gallons of paint = 512 / 50

Number of gallons of paint = 10.24

Therefore, it will take approximately 10.24 gallons of paint to paint the wall.

To calculate the cost of the paint, we need to multiply the number of gallons of paint by the cost per gallon:

Cost of paint = Number of gallons of paint x Cost per gallon

Cost of paint = 10.24 x $27

Cost of paint = $276.48

Therefore, it will cost $276.48 to paint the wall.

Probability of Janie winning game = (2⁴⁷ - 1)/2⁴⁷  or approximately 0.999999999999978, using binomial distribution with given information.

We can solve this probability by using the binomial distribution. Let X be the random variable representing the number of heads in the remaining tosses until one of the players wins the game. Since Luka has 24 points, Janie needs to win X heads before Luka wins one more.

We want to find the probability that Janie wins the game, which is the probability that X is greater than or equal to Luka's remaining points needed to win(25 - 24 = 1).

Let p be the probability of the coin landing heads up, and q be the probability of the coin landing tails up, so that p + q = 1. Since the coin is fair, p = q = 1/2.

Using the binomial distribution, the probability that Janie wins the game is:

P(X >= 1) = 1 - P(X = 0)

where

P(X = k) = [tex](47 - 24 choose k) (1/2)^k (1/2)^(47 - 24 - k)[/tex]

= (23 + k choose k) (1/2)⁴⁷

where k = 0, 1, 2, ..., 23.

Therefore,

P(X = 0) = (23 choose 0) (1/2)⁴⁷ = 1/2⁴⁷

P(X >= 1) = 1 - P(X = 0) = 1 - 1/2⁴⁷

Simplifying,

P(X >= 1) = (2⁴⁷ - 1)/2⁴⁷

Therefore, the probability that Janie wins the game is (2⁴⁷ - 1)/2⁴⁷ or approximately 0.999999999999978.

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The equation that can be used to determine the number of minutes t, from now and height, ℎ (in feet), at which they will pass each other is 75t = h.

The time taken for them to pass each other is calculated as follows;

Apply the rules of relative velocity;

(V₂ - V₁)t = h

where;

(30 ft/min - ( -45 ft/min )t = h

75t = h

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The probability that at least two people in a group of 30 have the same birthday is about 0.7063 or 70.63%.

To calculate the probability that at least two people in a group of 30 have the same birthday, we can use the complement rule:

P(at least 2 people have the same birthday) = 1 - P(all people have different birthdays)

The probability that the first person has a unique birthday is 1 (since there are no other people to share with yet).

The probability that the second person also has a unique birthday is 364/365 (since there are now 364 days left out of 365 that they could have a different birthday from the first person).

Similarly, the probability that the third person has a unique birthday is 363/365, and so on. So, we can write:

P(all people have different birthdays) = 1 x 364/365 x 363/365 x ... x 336/365

Using a calculator or computer program, we can evaluate this expression to be approximately 0.2937.

Therefore,

P(at least 2 people have the same birthday) = 1 - 0.2937 = 0.7063

So the probability that at least two people in a group of 30 have the same birthday is about 0.7063 or 70.63%.

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To answer this question, we need to know the specific governing equation of the system. Without this information, we cannot determine the value of x in steady state for either case.

However, we do know that the coefficient 'a' in the equation is a positive constant. When a=4, we can solve for x in steady state using the given equation and the value of a=4. When a=2, we can solve for x in steady state using the same equation and the new value of a=2.

In general, the value of x in steady state will depend on the specific equation and the values of its coefficients.
Hi there! To help you with your question, I need more information about the governing equation of the system. Please provide the complete equation with 'x' and the coefficient 'a'. Once I have that information, I can help you find the steady-state values of x for a=4 and a=2.

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Answer: To find the total amount of sugar required to make the banana pudding, we need to add the amount of sugar needed for the flour mixture to the amount of sugar needed for the meringue topping.

The recipe calls for 2/3 of a cup of sugar for the flour mixture and 1/4 of a cup of sugar for the meringue topping. To add these two fractions, we need to find a common denominator. The least common multiple of 3 and 4 is 12, so we can convert these fractions to twelfths:

2/3 = 8/12

1/4 = 3/12

Now we can add these two fractions:

8/12 + 3/12 = 11/12

So the total amount of sugar required to make the banana pudding is 11/12 of a cup.

The probability of drawing either a two or a ten is (4+4)/52, which simplifies to 2/13.
The probability of drawing either a two or a club is (3+13)/52, which simplifies to 4/13.

For the first question: In a standard deck of 52 cards, there are four 2s and four 10s. The probability of drawing either a two or a ten is the number of successful outcomes (drawing a 2 or a 10) divided by the total number of possible outcomes (52 cards). So, the probability is (4+4)/52 = 8/52. This can be reduced to the fraction 2/13.

For the second question: There are four 2s and thirteen clubs in a standard deck of 52 cards. Since one of the 2s is a club, there are three additional 2s that are not clubs. The probability of drawing either a two or a club is the number of successful outcomes (3 additional 2s + 13 clubs) divided by the total number of possible outcomes (52 cards). So, the probability is (3+13)/52 = 16/52. This can be reduced to the fraction 4/13.

Therefore,
1) Probability of drawing either a two or a ten: 2/13
2) Probability of drawing either a two or a club: 4/13

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Answer:

4

Step-by-step explanation:

2/3 / 1/6

= 2/3 * 6/1

= 12/3

= 4.

The length of the diagonal of the square is 22 meters.

A square is a four-sided two-dimensional geometric shape in which all sides are equal in length and all angles are right angles (90 degrees).It is a unique instance of a rectangle with equal sides. The opposite sides of a square are parallel to each other and the diagonals bisect each other at right angles.

A square is divided into two 45-45-90 triangles by its diagonal.

In a 45-45-90 triangle, the hypotenuse (the side opposite the right angle) is √2 times as long as each leg.

Therefore, in this square, the length of the diagonal (d) can be found by multiplying the length of one side (s) by √2:

d = s√2

In this case, the side length of the square is 11√2 meters, so:

d = 11√2 × √2 = 11 × 2 = 22 meters

Therefore, the length of the diagonal of the square is 22 meters.

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The derivative of f(x) is: f'(x) = [tan⁻¹(2)/2] - [tan⁻¹(1/2)/2]

The Fundamental Theorem of Calculus is a pair of theorems that link the concept of differentiation and integration. It states that if a function f(x) is continuous on an interval [a, b] and F(x) is the antiderivative of f(x) on the same interval, then:

Part I: The derivative of the integral of f(x) from a to x is equal to f(x):

d/dx ∫a to x[tex]f(t) dt = f(x)[/tex]

Part II: The integral of the derivative of a function f(x) on an interval [a, b] is equal to the difference between the values of the function at the endpoints of the interval:

∫a to b [tex]f'(x) dx = f(b) - f(a)[/tex]

Using Part I of the Fundamental Theorem of Calculus, we have:

f(x) = x∫4 1/(1+4t⁴) dt

Then, by the Chain Rule, we have:

f'(x) = d/dx [x∫4 1/(1+4t⁴) dt] = ∫4 d/dx [x(1/(1+4t⁴))] dt

= ∫4 (1/(1+4t⁴)) dt

= [tan⁻¹(2t)/2]₄¹

= [tan⁻¹(2)/2] - [tan⁻¹(1/2)/2]

Therefore, the derivative of f(x) is:

f'(x) = [tan⁻¹(2)/2] - [tan⁻¹(1/2)/2]

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The angle measurement would remain as 40 degrees

No, when a geometric figure, such as a line or an angle, is translated (moved) to a new position without being rotated, reflected, or scaled, its shape and size do not change, and therefore its angle measure remains the same.

This property is a fundamental concept in geometry and is known as the "invariance of angle measure under translation". It means that if two angles are congruent (have the same measure) in their original position, they will remain congruent after being translated to a new position.

Hence The angle measurement would remain as 40 degrees

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To solve this problem, we will use the formula for exponential decay as follows: V = P * e^(-rt) where V is the value after t years, P is the initial value, r is the annual interest rate as a decimal, and t is the time in years.

What is Depreciation: Depreciation is dependent on a number of estimates.The method in which companies determine the depreciation value of their assets is different from one another. Some companies may use a straight line method of depreciation and another may count the depreciation according to asset's production value. What is exponential decay: An exponential function's curve is created by a pattern of data called exponential decay, which exhibits higher decreases over time .Given that a brand new Audi R8 is purchased for $148,700 before taxes, and the car depreciates at a rate of 8%, we can find how much it will be worth in 5 years. Using the formula for exponential decay, we have V = P * e^(-rt) where     P = $148,700r = 0.08t = 5. Therefore,V = $148,700 * e^(-0.08 * 5), V = $148,700 * e^(-0.4)V ≈ $82,429.61. Therefore, the car will be worth approximately $82,429.61 in 5 years.

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Answer:

The integers are 129 and 130.

Step-by-step explanation:

[tex] {(x + 1)}^{2} - {x}^{2} = 259[/tex]

[tex] {x}^{2} + 2x + 1 - {x}^{2} = 259[/tex]

[tex]2x + 1 = 259[/tex]

[tex]2x = 258[/tex]

[tex]x = 129[/tex]

[tex]x + 1 = 130[/tex]

The two consecutive integers whose squares have a difference of 259 are 8 and 9.

Let x be the first of the two consecutive integers, then the next integer would be x+1. We are given that the squares of these two integers have a difference of 259, so we can write an equation as (x+1)^2 - x^2 = 259. Expanding the equation gives x^2 + 2x + 1 - x^2 = 259.

Simplifying the equation gives 2x + 1 = 259. Subtracting 1 from both sides gives 2x = 258, which means x = 129. Therefore, the two consecutive integers are 129 and 130. However, we need to check if their squares have a difference of 259. We find that 130^2 - 129^2 = 169 + 260 = 429, which is not equal to 259.

Therefore, the assumption that x is 129 is incorrect. Instead, we try x = 8. Then, the next integer is 9, and their squares are 64 and 81 respectively. The difference between their squares is 81 - 64 = 17, which is not equal to 259. However, if we reverse the order, we get 81 - 64 = 259. Therefore, the answer is 8 and 9.

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The value of x in the data set is 101.

The mean of a data set is the sum of all the data divided by the count n.

Therefore, let's find the mean of the data set as follows:

The mean is  the sum of the data divided by the total number of data.

Hence, let's find the value of x using the mean

108  = 102 + 120 + 103 + 112 + 110 + x  / 6

108 = 547 + x / 6

Cross multiply

108 × 6 = 547 + x

648 = 547 + x

x = 648 - 547

x = 101

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The force on a sail with an area of 250 f12 and a wind speed of 35 mph would be 108.72 pounds.

We are given that the wind force F on a sail varies jointly as the area A and the square of the wind speed W. We can represent this relationship mathematically using the equation:

F = k * A * W²

where k is a constant of proportionality.

We are also given that the force on a sail with an area of 500 p and wind speed of 18 mph is 64.8 pounds. We can use this information to solve for k:

64.8 = k * 500 * 18²

Solving for k, we get:

k = 64.8 / (500 * 18²)

k = 0.0000768

Now, we can use the equation to find the force for a sail with an area of 250 f12 and a wind speed of 35 mph:

F = 0.0000768 * 250 f12 * 35²

F = 108.72 pounds

Therefore, the force on a sail with an area of 250 f12 and a wind speed of 35 mph would be 108.72 pounds.

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Answer:The probability of both is 1/4*13/51.

Step-by-step explanation:

There are 52 cards in the deck, 13 hearts and 13 spades. The probability of getting a heart is 13/52 or 1/4. Given an initial heart there are 51 cards remaining; the probability of a spade is now 13/51

At the point (5, 17, 1), the partial derivatives of z with respect to x and y are -12.5 and 0.25, respectively, as calculated using implicit differentiation. At the point (5, 17, 1), the partial derivatives of z with respect to z and y are 0.16 and -1.

To find the partial derivatives, we need to use the implicit differentiation.

To find ∂z/∂x, we differentiate the equation with respect to x, treating y and z as functions of x

4z^3(dz/dx) + 2z^2x^2 - 0 - 0 = 0

Simplifying, we get

4z^3(dz/dx) = -2z^2x^2

(dz/dx) = -1/2x^2z

At the point (5, 17, 1), we have

(dz/dx) = -1/2(5)^2(1) = -12.5

To find ∂z/∂y, we differentiate the equation with respect to y, treating x and z as functions of y

4z^3(dz/dy) - 1 - 0 + 0 = 0

Simplifying, we get

4z^3(dz/dy) = 1

(dz/dy) = 1/4z^3

At the point (5, 17, 1), we have

(dz/dy) = 1/4(1)^3 = 0.25

To find ∂z and ∂y at the point (5, 17, 1), we need to take partial derivatives with respect to z and y, respectively, of the implicit equation

z^4 + z^2x^2 - y - 9 = 0

Taking the partial derivative with respect to z, we get

4z^3 + 2z^2x^2(dz/dz) - dy/dz = 0

Simplifying and solving for ∂z, we get

∂z = dy/dz = 8z^3/(2z^2x^2) = 4z/x^2

At the point (5, 17, 1), we have

z = 1, x = 5

So, ∂z at the point (5, 17, 1) is

∂z = 4z/x^2 = 4(1)/(5^2) = 0.16

To find ∂y, we take the partial derivative with respect to y, keeping x and z constant

-1 = ∂y

Therefore, ∂y at the point (5, 17, 1) is -1.

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The maximum value of f(x, y) = x^y on the unit circle can be found using the constraint x^2 + y^2 = 1, which defines the unit circle. To solve this, we can use the method of Lagrange multipliers.

Let g(x, y) = x^2 + y^2 - 1. Then, the gradient of f(x, y) and the gradient of g(x, y) should be proportional:
∇f(x, y) = λ∇g(x, y)

Calculating the gradients:
∇f(x, y) = (yx^(y-1), x^y * ln(x))
∇g(x, y) = (2x, 2y)

Equating the components and dividing the equations, we get:
y * x^(y-1) / 2x = x^y * ln(x) / 2y

Simplifying, we obtain:
ln(x) = y

Now, using the constraint x^2 + y^2 = 1, we can substitute y with ln(x) and solve for x:
x^2 + (ln(x))^2 = 1

Numerically solving this equation, we get x ≈ 0.90097 and y ≈ ln(0.90097) ≈ -0.10536. Since we are only interested in positive values of x and y, this is the only solution in our domain. Now, we can find the maximum value of f(x, y):
f_max = f(0.90097, -0.10536) ≈ 0.79307

So the maximum value of f(x, y) on the unit circle is approximately 0.79307.

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Rachel's beginning balance one year ago if she has made no other deposits during the year is $800.00. Therefore, the correct option is 2.

To find Rachel's beginning balance one year ago, given that she currently has $836 in a savings account with a 4.5% annual compound interest rate, we'll use the compound interest formula:

A = P(1 + r/n)^(nt)

Where:

A = the final amount ($836)

P = the principal (beginning balance) - this is what we're trying to find

r = the annual interest rate (0.045 or 4.5%)

n = the number of times interest is compounded per year (assuming it's compounded annually, n = 1)

t = the number of years (1 year)

First, rearrange the formula to solve for P:

P = A / (1 + r/n)^(nt)

Now, plug in the values:

P = 836 / (1 + 0.045/1)^(1*1)

Simplify the equation:

P = 836 / (1.045)^1

Calculate the result:

P ≈ 800.00

So, Rachel's beginning balance one year ago was approximately $800.00 which corresponds to option 2.

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There are 1350 4-digit numbers that have the second digit even and the fourth digit at least twice the second digit.

To form a 4-digit number, we have 10 choices for each digit, except the first digit, which can't be 0. Hence, there are 9 choices for the first digit.

For the second digit, there are 5 even digits (0, 2, 4, 6, 8) to choose from.

For the third digit, there are 10 choices.

For the fourth digit, we can choose any of the even digits we picked for the second digit, or any of the larger odd digits 4, 6, 8.

Hence, the number of 4-digit numbers that meet the given criteria is

9 × 5 × 10 × 3 = 1350.

Therefore, there are 1,350 4-digit numbers that have the second digit even and the fourth digit at least twice the second digit.

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The area of the ring is 1,462.81 square feet, under the condition that a circle is circumscribed around a regular octagon with side lengths of 10 feet.

The area of the ring formed by the two circles can be evaluated using the formula for the area of a ring which is

Area of ring = π(R² - r²)

Here
R = radius of the larger circle
r = smaller circle radius

The radius of the larger circle is equal to half the diagonal of the octagon which is 10 feet. Applying Pythagoras theorem, we can evaluate that the length of one side of the octagon is 10/√2 feet.
Radius of the larger circle is

R = 5(10/√2)
= 25√2/2 feet
≈ 17.68 feet

Staging these values into the formula for the area of a ring,

Area of ring = π(17.68² - 10²) square feet

Area of ring ≈ 1,462.81 square feet
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The polynomials are multiplied to give the expression x³ + 3x² - 22x - 24

We need to know that algebraic expressions are described as expressions that are composed of terms, variables, their coefficients, factors and constants.

Also, these expressions are made up of mathematical operations. They are listed as;

From the information given, we have the expression;

(x+6)(x2−3x−4)

expand the bracket, we get;

x³ - 3x² - 4x + 6x² - 18x - 24

add the like terms, we get;

x³ + 3x² - 22x - 24

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The style that will be least expensive for the project, based on the product of the fractions representing the dimensions is the Style D that will yield a total cost of $25.92

A fraction is a representation of a part of a whole. It is a quantity which forms part of a whole number.

The area Qiang wants to tile = 3 ft × 3 ft

The price list and area of each tile, based on the product of the fractions of the tile dimensions are;

A; (5/6) × (1 1/12) = 65/72 cost 3.25

B; (5/6) × (2 1/12) = 125/72 cost 6.20

C; (5/6) × (5/6) = 5/16 cost  2.75

D; (5/12) × (3/4) = 5/16 cost 0.90

E; (5/12) × (5/12) = 25/144 cost 0.65

The areas of the tiles are;

The number of tiles required,  are;

Cost of tiles style A = 9/(65/72) × 3.25 = 32.4

Cost of tiles style B = 9/(125/72) × 6.20 = 32.14

Cost of tiles style C = 9/(5/16) × 2.75 = 79.2

Cost of tiles style D = 9/(5/16) × 0.90 = 25.92

Cost of tiles style E = 9/(25/144) × 0.65 = 33.696

The least expensive style for the project is style D

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Answer:

4,6,[tex]\sqrt{52} \\[/tex]

Step-by-step explanation:

Area of right triangle= base x height/2=12, but if we remove the division then it's:

base x height=24

factors of 24= 6,4  8,3 24,1 and 12,2

we have the rule that "One leg of the triangle measures one and a half times the length of the other leg." and the pair that matches that is 6 and 4.

So leg a=4 and leg b=6. Using the Pythagorean theorem(a^2+b^2=c^2) we have:

4^2+6^2=c^2=16+36=52 so the answer is 4,6,[tex]\sqrt{52} \\[/tex]

Step-by-step explanation:

the

answer

of

this

question

is

9 \sqrt{2}

Do you like this (^__^) ??

Answer:

1.6×10^-12..............