A070B- Exponential Decay

Is the following growth or decay?

$f(t) = 6(\frac{4}{5})^t$

Growth

Decay

Question 1 of 10

Is the following growth or decay?

$f(t) = 3(\frac{5}{2})^t$

Growth

Decay

Question 2 of 10

Is the following growth or decay?

$f(t) = 0.25(1.4)^t$

Growth

Decay

Question 3 of 10

Is the following growth or decay?

$f(t) = 2(0.23)^t$

Growth

Decay

Question 4 of 10

Which of the following could be represented by $f(t) = 1200(0.8)^t$ ?

An increase of birds by 80% each year

A decrease of birds by 20% each year

An increase of1200 birds each year

A decrease of 1200 birds each year

Question 5 of 10

Which of the following could be represented by $f(t) = 240(\frac{2}{3})^t$ ?

An increase by $\frac{2}{3}$ each year

A decrease by $\frac{2}{3}$ each year

A decrease by 33% each year

A decrease by 66% each year

Question 6 of 10

The snow is melting at a rate of 10% every hour on a warm day. If there is currently 24 inches of snow on the ground, how much snow will there be after 6 hours?

0.0024 in

14.4 in

42.5 in

12.8 in

Question 7 of 10

The population of deer in a forest is decreasing by 15% each year. If there are currently 53,000 in the forest, how many deer will there be after 4 years?

23, 500

27,666

92,697

26

Question 8 of 10

A chemical has a half-life of 15 years. How many years would it take for 100 grams of the chemical to decay until there are 6.25 grams remaining?

4 years

10 years

60 years

45 years

Question 9 of 10

A chess tournament starts with 128 participants. After each round, half the players are eliminated. How many rounds must be played before only two participants are left?

3

4

5

6

Question 10 of 10