A substance with a half life is decaying exponentially. If there are initially 12 grams of the substance and after 2 hours there
are 7 grams, how many grams will remain after 3 hours? Round your answer to the nearest hundredth, and do not include
units.
Provide your answer below:

Answer:

width*2 +length *2

Step-by-step explanation:

1. The monthly payment for Loan A is roughly $516.40.

2. The total interest for Loan A is roughly $1590.4

We've been given the formula: PMT = (P(r/n)) / [1 - (1 + r/n)^-nt] to calculate the monthly payment loan.

If we should insert the figures given to the formula, it should be

PMT = (17000(0.059/12)) / [1 - (1 + 0.059/12)^(-12*3)]

PMT = 516.40

To calculate  total interest for loan A, we use the formula  (PMT x n x t) - P.

If we insert the figure provided, it should be;

(598.87 x 12 x 3) - 17000

=  $1590.4

The above answer is in response to the question below as seen in the picture;

Suppose that you decide to borrow $17,000 for a new car. Installment loan A: 3 years at 5.9%. Use PMT = (p(r/n))/ [1 - (1 + r/n)^-nt]

Find the monthly payment and the total interest for loan A. The monthly payment for Loan A is $..............

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Answers:

a) The equation is  y = 196(0.77)^x

b) The chart is shown below

c) The graph is shown below

================================================

Explanation:

Part (a)

One template of an exponential equation is y = ab^x

In this case

If 23% of the audience leaves, then 77% remains. This is another way to see where b = 0.77 comes from. Exponential decay will have 0 < b < 1.

Therefore, the equation is y = 196(0.77)^x

Other equations are possible.

-------------------

Part (b)

I'll be using LibreOffice spreadsheet to make the table. Any spreadsheet software will do.

Type x into cell A1

Type 0 and 1 into cells A2 and A3 in that order.

Select cells A2 and A3. Pull down the small marker at the bottom right corner. Pull this marker down to cell A12 to get values 2 through 10 (which will be in cells A4 to A12).

Now move to cell B1. Type in y = 196(0.77)^x in this cell.

In cell B2, type in "=ROUND(196*(0.77)^A2)" without quotes. As you can probably guess, the ROUND function will round to the nearest whole number. The calculation 196*(0.77)^A2 computes the result of y = 196*0.77^x when plugging x = 0 which is in cell A2.

Do not forget about the equal sign up front.

After cell B2 is filled in, hit enter. Then pull down the smaller marker at the bottom right corner to cell B12. A bunch of whole numbers should fill in cells B3 to B12

This is what you should get for your table

[tex]\begin{array}{|c|c|} \cline{1-2}\text{x} & \text{y} = 196(0.77)^{\text{x}}\\\cline{1-2}0 & 196\\\cline{1-2}1 & 151\\\cline{1-2}2 & 116\\\cline{1-2}3 & 89\\\cline{1-2}4 & 69\\\cline{1-2}5 & 53\\\cline{1-2}6 & 41\\\cline{1-2}7 & 31\\\cline{1-2}8 & 24\\\cline{1-2}9 & 19\\\cline{1-2}10 & 14\\\cline{1-2}\end{array}[/tex]

x = week number

y = viewer count (approximate)

Example calculation:

Plug in x = 5 to get y = 196*0.77^5 = 53.05297 approximately which rounds to y = 53. Therefore, we estimate there would be about 53 people in the audience for week 5.

-------------------

Part (c)

You could use a spreadsheet to make the graph, but I find GeoGebra is more friendly for graphing. But we'll be using the data we just made in the spreadsheet.

Select cells A2 through B12. This is the 11 row by 2 column block of x,y data pairs. Do not select the headers at the top.

Copy that data and paste it into GeoGebra's spreadsheet mode.

Then select that same block of data in GeoGebra. Right-click to go to "create" then to "list of points". It will do as it describes. Eleven points will show up in the graph window. Resize and adjust the window if needed.

I'm using the following window parameters

The graph is shown in the screenshot below.

Answer:

[tex]\textsf{a.} \quad \textsf{Equation:} \;\;\;y=196(0.77)^x[/tex]

b.  See below.

c.  See attachment.

Step-by-step explanation:

We can model the given situation using an exponential decay equation since the weekly change in audience is a constant percentage change.

[tex]\boxed{y=a(1-r)^x}[/tex]

where:

Given the movie started with an audience of 196 people viewing, a = 196.

Given the movie loses 23% of its audience each week, r = 0.23.

As the movie loses a constant percentage of its audience each week, let x be the number of weeks.

Substitute the values of a and r into the formula and simplify:

[tex]y=196(1-0.23)^x[/tex]

[tex]y=196(0.77)^x[/tex]

Therefore, the equation that models the given scenario is:

[tex]\boxed{y=196(1-0.23)^x}[/tex]

Create a table for the first ten weeks by substituting the values of x from zero through 10 into the equation. Round each number to the nearest whole number.

[tex]\begin{array}{|c|c|}\cline{1-2}\vphantom{\dfrac12}$Weeks$\;x&$Audience$\;y\\\cline{1-2}\vphantom{\dfrac12}0&196\\\cline{1-2}\vphantom{\dfrac12}1&151\\\cline{1-2}\vphantom{\dfrac12}2&116\\\cline{1-2}\vphantom{\dfrac12}3&89\\\cline{1-2}\vphantom{\dfrac12}4&69\\\cline{1-2}\vphantom{\dfrac12}5&53\\\cline{1-2}\vphantom{\dfrac12}6&41\\\cline{1-2}\vphantom{\dfrac12}7&31\\\cline{1-2}\vphantom{\dfrac12}8&24\\\cline{1-2}\vphantom{\dfrac12}9&19\\\cline{1-2}\vphantom{\dfrac12}10&14\\\cline{1-2}\end{array}[/tex]

The graph of the function is an exponential decay curve, which starts at (0, 196) and approaches zero as x approaches infinity.

The x-axis represents the number of weeks and the y-axis represents the audience size.

Use a scale of x : y = 1 : 10.

Plot the points from the table and draw a smooth curve through them that approaches zero as x approaches infinity.

The order of a matrix is 2 x 5.

We have,

The order of a matrix is in the form of:

= number of rows x number of columns

Now,

The given matrix has 2 rows.

The given matrix has 5 columns.

Now,

= number of rows x number of columns

= 2 x 5

Thus,

The order of a matrix is 2 x 5.

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The derivative of y with respect to x is:

[tex]dy/dx = -4x / (1 - x^4)[/tex]

The chain rule and the quotient rule must be utilized in order to determine the derivative of y with respect to x.:

First, we can rewrite y as follows:

[tex]y = ln[(1 - x^2)/(1 + x^2)][/tex]

Let's define two functions:

[tex]u = 1 - x^2[/tex]

[tex]v = 1 + x^2[/tex]

Then, y can be rewritten in terms of u and v as:

y = ln(u/v)

Now, we can use the chain rule to find the derivative of y with respect to u and v, respectively:

[tex]dy/du = 1/u\\dy/dv = -1/v[/tex]

Using the quotient rule, we can find the derivative of y with respect to x:

[tex]dy/dx = (dy/du) * (du/dx) + (dy/dv) * (dv/dx)[/tex]

[tex]du/dx = -2x\\dv/dx = 2x[/tex]

Substituting in the values we get:

[tex]dy/dx = (dy/du) * (du/dx) + (dy/dv) * (dv/dx)\\= (1/u) * (-2x) + (-1/v) * (2x)\\= -2x/(1 - x^2) - 2x/(1 + x^2)\\= -4x / (1 - x^4)[/tex]

Therefore, the derivative of y with respect to x is:

[tex]dy/dx = -4x / (1 - x^4)[/tex]

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We define ln(x)=int[(1 , x)(1/t)dt], then (ln(x))’=1/x . Define e^x as the inverse of ln(x) .

Then lim [ln(1+x)/x] =lim 1/(1+x) =1 as x approaches to 0 (using the Hp rule). Let ln(1+y)=x then y=e^x-1 and lim[ln(1+y)/y]=lim[x/e^x-1]=1 as x approaches to 0. then limit[(e^h-1)/h]=1 as h approaches to 0 . We have

lim[(5e^x-5e^(x+h))/3h]=(5/3)lim[(e^x-(e^x)(e^h))/h]=(5/3)e^xlim[(1-e^h))/h]=

-(5/3)e^xlim[(e^h-1))/h]=-(5/3)e^x as h approaches to 0.

The building is 246 feet tall.

Two or more triangles will always be referred to as similar if on comparing their corresponding properties, some common relations holds. Some of the relations are relations between their length of sides, relations among their internal angles etc.

To determine the height of the building, we have;

height of pole = 7 ft

total length of the building's shadow = 167 ft

the length of the shadow of the pole = 4.75 ft

Let the height of the building be represented by h. On comparison, we have;

4.75/ 167 = 7/h

4.75h = 167 x 7

         = 1169

h = 1169/ 4.75

  = 246.11

The building is 246 ft. tall.

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Answer:

12 is the answer

Step by step explanation

to get answer move all terms not containing x to the right side of the equation

The length of the segment CD given the length of BE is 42 inches

From the question, we have the following parameters that can be used in our computation:

Using the proportional ratio from the triangle, we have

CD = 1.5 * BE

substitute the known values in the above equation, so, we have the following representation

CD = 1.5 * 28

Evaluate

CD = 42

HEnce, the lengtth is 42 inches

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linear regression equations can be used to accurately predict the price of a diamond given its carat weight or color rating.

By fitting a line to the paired data, the slope of the line can be used to determine the rate of change in price for a given increase in carat weight or color rating. This can then be used to accurately predict the price of a diamond with a given carat weight or color rating.

What is Equation?
An equation is a mathematical statement that states the equality of two expressions. It is made up of two parts—the left side and the right side—that are separated by an equal sign (=). The left side of an equation is made up of terms, which are numbers and/or variables, and the right side is made up of a single number or variable. Equations are used to solve for unknown values in mathematics, science, and engineering.

The best predicted price of a diamond with a weight of 1.6 carats can be found by using a linear regression equation. This equation uses the paired carat weight (x) and the price (y) data to produce a line that best fits the data. The slope of the line will help determine the rate at which the price changes as the carat weight increases. The equation can then be used to calculate the predicted price of a diamond with a weight of 1.6 carats.

The best predicted price of a diamond with a color rating of 3 can be found by using the paired color (x) and the price (y) data. Using the data, a linear regression equation can be used to produce a line that best fits the data. The slope of the line will help determine the rate at which the price changes as the color rating increases. The equation can then be used to calculate the predicted price of a diamond with a color rating of 3.

In conclusion, linear regression equations can be used to accurately predict the price of a diamond given its carat weight or color rating. By fitting a line to the paired data, the slope of the line can be used to determine the rate of change in price for a given increase in carat weight or color rating. This can then be used to accurately predict the price of a diamond with a given carat weight or color rating.

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Answer: 0

Step-by-step explanation:

[tex]log_{3} log_{5} log_{2} 32[/tex]

Let's evaluate    

[tex]log_{2}32[/tex]   this is the same as

[tex]2^{x}=32[/tex]       2*2*2*2*2=32  

or

you can think of it as 2 to the what power is 32

so x=5

now substitute that in for [tex]log_{2}32[/tex]

[tex]log_{3} log_{5} 5[/tex]

Now evaluate   [tex]log_{5}5[/tex]

5 to the what power is 5

=1

substitute into [tex]log_{3} log_{5} 5[/tex]

[tex]log_{3} 1[/tex]

3 to the what power is 1

=0

Anything to the 0 power is 1 (it's a rule)

An equation is y = -12/3 when x = 3, y = -4.

What is equation?

An equation is a mathematical statement that indicates that two expressions are equal to each other. It typically consists of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Equations are used to solve problems and find the value of unknown variables that satisfy the given conditions.

If x and y vary inversely, it means that as x increases, y decreases and vice versa. We can write this relationship as:

x × y = k

where k is a constant of proportionality. To find the value of k, we can use the given information.

When x = 3, y = -4:

3 × (-4) = k

k = -12

Now we can substitute k into the equation to get:

x × y = -12

This is the equation relating x and y. To find y when x = 3:

3 × y = -12

y = -12/3

Therefore, when x = 3, y = -12/3.

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An equation is y = -12/3 when x = 3, y = -4.

What is equation?

An equation is a mathematical statement that indicates that two expressions are equal to each other. It typically consists of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Equations are used to solve problems and find the value of unknown variables that satisfy the given conditions.

If x and y vary inversely, it means that as x increases, y decreases and vice versa. We can write this relationship as:

x × y = k

where k is a constant of proportionality. To find the value of k, we can use the given information.

When x = 3, y = -4:

3 × (-4) = k

k = -12

Now we can substitute k into the equation to get:

x × y = -12

This is the equation relating x and y. To find y when x = 3:

3 × y = -12

y = -12/3

Therefore, when x = 3, y = -12/3.

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Answer:

$731.71

Step-by-step explanation:

300 over 4 years = 75$ per yr

9% per year so 4 years interest  = (1+9%)^4 = 1.41

so effective int rate for 4 years is 41%.

41% * x = 300

x = $731.71

The time it would take for the trains to pass each other, would be 58.54 minutes.

The trains were initially 200 km apart and so we need to find the time till they pass each other, with the speeds they are currently going at.

To find this time, we first need to find the combined speeds of the trains to be :

= 96 + 109

= 205 km / h

With the combined speed, the time till they pass each other would be:

= Distance between trains / Combined speed

= 200 / 205

= 58. 54 minutes

= 0. 98 hours

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The time it would take for the trains to pass each other, would be 58.54 minutes.

The trains were initially 200 km apart and so we need to find the time till they pass each other, with the speeds they are currently going at.

To find this time, we first need to find the combined speeds of the trains to be :

= 96 + 109

= 205 km / h

With the combined speed, the time till they pass each other would be:

= Distance between trains / Combined speed

= 200 / 205

= 58. 54 minutes

= 0. 98 hours

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You would need approximately 23.077 pounds of whole apples to make 18 pounds of peeled and cored apples with a 78% yield percentage.

Explanation:

To find out how many pounds of whole apples are needed to make 18 lbs of peeled and cored apples with a yield percentage of 78%, we can use the following formula:

Pounds of whole apples needed = (Pounds of peeled and cored apples needed) / Yield percentage

Plugging in the values we have:

Pounds of whole apples needed = 18 lb / 0.78Pounds of whole apples needed = 23.077 lb (rounded to three decimal places)

Therefore, you would need approximately 23.077 pounds of whole apples to make 18 pounds of peeled and cored apples with a 78% yield percentage.

Answer:

[tex]f(-1) = -2\\[/tex]

[tex]f(0)=0[/tex]

[tex]f(1)=2[/tex]

Step-by-step explanation:

f(x)=2x

1) f(-1) = 2(-1) = -2

2) f(0) = 2(0) = 0

3)  f(1) = 2(1) = 2

Answer:

Therefore, the circumference of the circle circumscribed about the right triangle with legs 5 cm and 3 cm is approximately 18.85 cm (rounded to two decimal places).

Step-by-step explanation:

To find the circumference of a circle circumscribed about a right triangle with legs 5 cm and 3 cm, we can use the Pythagorean theorem to find the length of the hypotenuse, which is also the diameter of the circle.

Using the Pythagorean theorem, we have:

c^2 = 5^2 + 3^2

c^2 = 25 + 9

c^2 = 34

c = sqrt(34)

So the diameter of the circle is sqrt(34) cm, and the radius is half of the diameter, or sqrt(34)/2 cm.

The circumference of a circle is given by the formula:

C = 2 * pi * r

where pi is approximately 3.14 and r is the radius of the circle.

Substituting the value of the radius, we get:

C = 2 * 3.14 * sqrt(34)/2

C = 3.14 * sqrt(34)

Therefore, the circumference of the circle circumscribed about the right triangle with legs 5 cm and 3 cm is approximately 18.85 cm (rounded to two decimal places).

Answer:

The best measure of central tendency to use in a set of data depends on the characteristics of the data and the specific objective of the analysis. Let's examine the given data set: 12, 8, 15, 45, 7, 13.

Mean: The mean, also known as the average, is calculated by summing up all the values in the data set and dividing by the total number of values. The mean is sensitive to extreme values and can be influenced by outliers. In this case, the mean is calculated as (12 + 8 + 15 + 45 + 7 + 13) / 6 = 100 / 6 ≈ 16.67.

Median: The median is the middle value in a data set when the values are arranged in ascending or descending order. The median is not affected by extreme values and is a good measure to use when there are outliers or when the data is not symmetrically distributed. In this case, when the data set is arranged in ascending order, the median is 13, as it is the middle value.

Mode: The mode is the value that appears most frequently in a data set. It is a useful measure when we want to identify the most common value in the data set. In this case, the mode is not applicable as there are no repeated values in the data set.

Based on the characteristics of the given data set, the median is a good measure to use as it is not affected by extreme values and provides a central value that represents the middle of the data set. The mean may be influenced by the outlier value of 45, and the mode is not applicable in this case. So, the best measure of central tendency to use in this data set would be the median.

Answer:

-1.82

Step-by-step explanation:

It won't let me write the explanation for some reason. I'll put it in the comments below

The index of refraction of the second material is 1.27.

We are given that;

Angle= 59°

Randomized Variables 1 = 1.47θ1 = 59°θ2 = 69°

Now,

To find n2, we can rearrange Snell’s law as:

n2 = n1 sin θ1 / sin θ2

Plugging in the given values, we get:

n2 = 1.47 sin 59° / sin 69°

n2 = 1.47 (0.857) / (0.934)

n2 = 1.27 (rounded to two decimal places)

Therefore, by the expression the answer will be 1.27

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The 95% confidence interval for the mean time for all players is given as follows:

Between 7.14 minutes and 10.74 minutes.

The t-distribution is used when the standard deviation for the population is not known, and the bounds of the confidence interval are given according to the following rule:

[tex]\overline{x} \pm t\frac{s}{\sqrt{n}}[/tex]

In which the variables of the equation are presented as follows:

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 10 - 1 = 9 df, is t = 2.2622.

Inserting the data-set into a calculator, the parameters are given as follows:

[tex]\overline{x} = 8.94, s = 2.52, n = 10[/tex]

Then the lower bound of the interval is given as follows:

8.94 - 2.2622 x 2.52/sqrt(10) = 7.14 minutes.

The upper bound of the interval is given as follows:

8.94 + 2.2622 x 2.52/sqrt(10) = 10.74 minutes.

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Rick is more likely to select a large egg. Jens probability for a large egg is87.5 ricks is 90.7

Probability is a fundamental concept that gauges the plausibility of an event taking place. It is expressed numerically within the range of 0 to 1, with values corresponding to complete impossibility and absolute certainty respectively.

When probability values take on an exact midpoint value such as 0.5, they indicate equal probabilities for both possible outcomes. Experts use probability models before making significant decisions in fields such as science, engineering, finance, and speculative markets like gambling.

The study of these apprehension methods and their application form the foundation of probability theory, which helps analyze chance events' rules and guidelines.

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Answer:

Yes, 222 is an outlier

Step-by-step explanation:

{222, 346, 346, 435, 435, 505, 667, 667, 667, 779, 844}

Q1 = 435

Q3 = 667

IQR = Q3 - Q1 = 232

222 is below Q1 - 1.5*IQR (104)

Answer:

Step-by-step explanation:

Factoring a square root means that you are finding the closest numbers that multiply together. The easiest square roots are ones that factor directly into squares, such as √100, but more complicated ones involve several square roots, such as √225. Here are the steps to finding the square root using factoring:

   1. Find the factors. Factors are the numbers you multiply to find the total under the square root symbol. For √100, the factors would be √(10 x 10). The factors of √225 would be √(25 x 9).

   2. Separate the factors into their own square roots. Because both factors of √100 are 10, the square root of 100 is 10. For √225, you would separate the factors under their own square root signs, so the formula would be √25 x √9.

  3.  Solve for the individual squares. Next, you would find the squares of each of the individual factors. √25 = 5 and √9 = 3. The remaining formula will look like 5 x 3.

   4. Finish solving the equation. Now that you know what the simplified squares are, you will find that 5 x 3 = 15. So, √225 = 15.

Hope that helps!

Answer: ∠FGE

Step-by-step explanation:

Congruent: Have the same angle measure

Starting Angle: ∠BGC
Angle Of Congruence: ∠FGE