Rewriting Exponential Functions

Question 1

As time goes on, does the value of the investment grow or decay?

Revolt · Accepted Answer

decay

Question 2

What is the base of the exponential function?

Revolt · Accepted Answer

0.86

Question 3

What formula would you use to calculate the mass of fermium-253 remaining after d days?

Revolt · Accepted Answer

f(d)=400(0.794)d

Question 4

How many grams of fermium will remain after twenty-three days?

Revolt · Accepted Answer

1.986 g

Question 5

What did subtracting 5 in the exponent do to the function? Check all that apply.

Revolt · Accepted Answer

It shifts the graph of f right 5 units.; It divides all the y-values by 1.25.

Question 6

Four days later, Lexi takes 10mg of the same medicine. How much medication, L, is in Lexi’s system on day t?

Revolt · Accepted Answer

L = 10(1/2)t – 4

Question 7

How many half-steps are there between A440 and the E above it?

Revolt · Accepted Answer

7

Question 8

Fermium-253 has a half-life of three days. A sample contains 400 g. How long will it take for the sample to decay to 100 g? Number of half-lives:

Revolt · Accepted Answer

2

Question 9

Which equation below compares the amount of medicine, S, in Sofia’s system with the amount of medicine, L, in Lexi’s system?

Revolt · Accepted Answer

L = 16 x S

Question 10

Number of days:

Revolt · Accepted Answer

6

Rewriting Exponential Functions Answers