Quiz 7.2 - Properties, Applications, and Mixed Modelling - Katherine Rorabaugh | Biblioteka

5

Match the expressions using the properties of logarithms or exponents.
(Hint: You can try these out in your calculator by setting a, m, and n to different numbers.)

Stavka koja se može prevući		Odgovarajuća stavka
log_{b} (x)		a^{m+n}
a^{m}\cdot a^{n}		(ab)^{m}
\frac{a^{m}}{a^{n}}		a^{m\cdot n}
a^{m}\cdot b^{m}		\sqrt[n]{a}
a^{\frac{1}{n}}		a^{m-n}
(a^{m})^{n}		\frac{ln(x)}{ln(b)}

1

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=420(.981)^{x}

growth at 98.1%

decay at 98.1%

decay at 1.9%

growth at 1.9%

1

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=800(1.078)^{x}

growth at 1.078%

decay at 1.078%

decay at 7.8%

growth at 7.8%

1

Given the exponential function y=104(.77)^{x}, what is the percentage rate of growth/decay?
Enter your answer as an integer, no "%" or spaces.

1

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease per unit of x.
y=800(2.718)^{0.244x}

growth at 24.4%

growth at 27.6%

decay at 24.4%

decay at 27.6%

1

Given the following exponential function determine the percentage rate of increase or decrease per unit of x.
y=(4)^{-2x}
Enter your answer as a 4-digit number.

1

growth at 2.5% every minute

growth at 2.5% every 7500 minutes

decay at 2.5% every minute

decay at 2.5% every 7500 minutes

1

The function f(t) = 9200(0.79)^{t} represents the change in a quantity over t years. What does the constant 0.79 reveal about the rate of change of the quantity?

1

(Hint: find the equivalent monthly rate.)

f(t)=780(1.0297)^{12t}

f(t)=780(1.42)^{12t}

f(t)=780(1.0297)^{t}

f(t)=780(1.42)^{\frac{1}{12}t}

1

Dan and Ben invested the same amount in savings. Dan earns a certain rate of monthly interest, while Ben earns a certain rate of yearly interest. If they both end the year with the same amount of interest collected, who's interest rate is greater, Dan's or Ben's?

There is not enough information to determine this.

Ben's interest rate is greater than Dan's.

They have the same interest rate.

Dan's interest rate is greater than Ben's.

2

Categorize the following situations by the model that best suits them.

The path of a rock some time after it is launched from a catapult.
The value of a savings account some time after collecting interest.
The total amount of calories consumed after eating some number of M&Ms.
The population of rabbits after some time without predation.
The amount of gas in a tank after some distance driving.

Linear
Quadratic
Exponential Growth

A biologist is studying the growth of a bacterial colony in a petri dish. The table below shows the number of cells in the petri dish after some weeks during the study.

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When finding a regression model, the biologist gets the following values for r:

Linear: 0.8233

Quadr: 0.9804

Expon: 0.9905

Logar: 0.6934

1

Based on the r-values, what model best fits this data?

Linear

Quadratic

Exponential

Logarithmic

1

What will be the number of cells in week 6?
Round to the nearest whole number.

1

In what week will the number of cells reach one billion (1,000,000,000)?
Enter your answer as a number rounded to the nearest tenth.

The table below lists the time it takes for a turkey to reach certain temperatures after being pulled from a hot oven.

null

When finding a regression model, a student gets the following values for r:

Linear: 0.9068

Expon: error

Logar: 0.9708

1

According the r-values given, which model best suits the data?

Linear

Exponential

Logarithmic

1

Estimate the number of minutes the turkey will take to cool to a temperature of 70.
Enter your answer as a number rounded to the nearest tenth.
Note: it will be in between two of the time values, which is strange. It's okay.

Quiz 7.2 - Properties, Applications, and Mixed Modelling

Quiz 7.2 - Properties, Applications, and Mixed Modelling

Match the expressions using the properties of logarithms or exponents.(Hint: You can try these out in your calculator by setting a, m, and n to different numbers.)

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.y=420(.981)^{x}

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.y=800(1.078)^{x}

Given the exponential function y=104(.77)^{x}, what is the percentage rate of growth/decay?Enter your answer as an integer, no "%" or spaces.

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease per unit of x.y=800(2.718)^{0.244x}

Given the following exponential function determine the percentage rate of increase or decrease per unit of x.y=(4)^{-2x}Enter your answer as a 4-digit number.

The function f(t) = 9200(0.79)^{t} represents the change in a quantity over t years. What does the constant 0.79 reveal about the rate of change of the quantity?

(Hint: find the equivalent monthly rate.)

Dan and Ben invested the same amount in savings. Dan earns a certain rate of monthly interest, while Ben earns a certain rate of yearly interest. If they both end the year with the same amount of interest collected, who's interest rate is greater, Dan's or Ben's?

Categorize the following situations by the model that best suits them.

Based on the r-values, what model best fits this data?

What will be the number of cells in week 6?Round to the nearest whole number.

In what week will the number of cells reach one billion (1,000,000,000)?Enter your answer as a number rounded to the nearest tenth.

According the r-values given, which model best suits the data?

Estimate the number of minutes the turkey will take to cool to a temperature of 70.Enter your answer as a number rounded to the nearest tenth.Note: it will be in between two of the time values, which is strange. It's okay.

Match the expressions using the properties of logarithms or exponents.(Hint: You can try these out in your calculator by setting a, m, and n to different numbers.)

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.y=420(.981)^{x}

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.y=800(1.078)^{x}

Given the exponential function y=104(.77)^{x}, what is the percentage rate of growth/decay?Enter your answer as an integer, no "%" or spaces.

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease per unit of x.y=800(2.718)^{0.244x}

Given the following exponential function determine the percentage rate of increase or decrease per unit of x.y=(4)^{-2x}Enter your answer as a 4-digit number.

The function f(t) = 9200(0.79)^{t} represents the change in a quantity over t years. What does the constant 0.79 reveal about the rate of change of the quantity?

(Hint: find the equivalent monthly rate.)

Dan and Ben invested the same amount in savings. Dan earns a certain rate of monthly interest, while Ben earns a certain rate of yearly interest. If they both end the year with the same amount of interest collected, who's interest rate is greater, Dan's or Ben's?

Categorize the following situations by the model that best suits them.

Based on the r-values, what model best fits this data?

What will be the number of cells in week 6?Round to the nearest whole number.

In what week will the number of cells reach one billion (1,000,000,000)?Enter your answer as a number rounded to the nearest tenth.

According the r-values given, which model best suits the data?

Estimate the number of minutes the turkey will take to cool to a temperature of 70.Enter your answer as a number rounded to the nearest tenth.Note: it will be in between two of the time values, which is strange. It's okay.

Match the expressions using the properties of logarithms or exponents.
(Hint: You can try these out in your calculator by setting a, m, and n to different numbers.)

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=420(.981)^{x}

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=800(1.078)^{x}

Given the exponential function y=104(.77)^{x}, what is the percentage rate of growth/decay?
Enter your answer as an integer, no "%" or spaces.

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease per unit of x.
y=800(2.718)^{0.244x}

Given the following exponential function determine the percentage rate of increase or decrease per unit of x.
y=(4)^{-2x}
Enter your answer as a 4-digit number.

What will be the number of cells in week 6?
Round to the nearest whole number.

In what week will the number of cells reach one billion (1,000,000,000)?
Enter your answer as a number rounded to the nearest tenth.

Estimate the number of minutes the turkey will take to cool to a temperature of 70.
Enter your answer as a number rounded to the nearest tenth.
Note: it will be in between two of the time values, which is strange. It's okay.

Match the expressions using the properties of logarithms or exponents.
(Hint: You can try these out in your calculator by setting a, m, and n to different numbers.)

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=420(.981)^{x}

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease.
y=800(1.078)^{x}

Given the exponential function y=104(.77)^{x}, what is the percentage rate of growth/decay?
Enter your answer as an integer, no "%" or spaces.

Given the following exponential function, identify whether it represents exponential growth or decay, and determine the percentage rate of increase or decrease per unit of x.
y=800(2.718)^{0.244x}

Given the following exponential function determine the percentage rate of increase or decrease per unit of x.
y=(4)^{-2x}
Enter your answer as a 4-digit number.

What will be the number of cells in week 6?
Round to the nearest whole number.

In what week will the number of cells reach one billion (1,000,000,000)?
Enter your answer as a number rounded to the nearest tenth.

Estimate the number of minutes the turkey will take to cool to a temperature of 70.
Enter your answer as a number rounded to the nearest tenth.
Note: it will be in between two of the time values, which is strange. It's okay.