Exponential Growth & Decay Review

• D. All real numbers

A culture of bacteria doubles every hour. Write a function that can be used to find the number of bacteria, N, at the end of x hours if there were initially 15 bacteria in the culture.

• 15+x

• 15*2*x

Tags

CCSS.HSF.LE.A.2

The function f(x) = 75(1.025)^x represents the balance in Jonathan’s savings account x years after opening it. What does the value 75 represent?

• A. The growth factor of the amount of money in Jonathan’s savings account.

• B. The initial amount in Jonathan’s savings account.

• C. The final amount in Jonathan’s savings account.

• D. The decay factor of the amount of money in Jonathan’s savings account

Tags

CCSS.HSF.LE.B.5

• 14

• 12

• 10

• 8

Tags

CCSS.HSF-IF.C.7E

Engineers track population trends in major cities to plan for housing and apartment construction. The table shows the population of a major city from several years since 2009. The data can be represented by an exponential function.

Which function best models the data?

Tags

CCSS.HSF.LE.A.2

Write an exponential function to represent the table.

Tags

CCSS.HSF.LE.A.2

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Tags

CCSS.HSF-IF.C.7E

• The graph crosses the x-axis at (120, 0).

• The graph crosses the y-axis at (0, 120).

Tags

CCSS.HSF-IF.C.7E

The graph shows the number of books sold in millions since 2000. Based on this information, which function best models the number of books sold in millions x years since 2000?

Tags

CCSS.HSF.LE.A.2

• $375

• $318.75

• $450

• $300

Tags

CCSS.HSF.LE.B.5