A070- Exponential Decay

Answer the following.

Is the following growth or decay?
$f(t) = 3(\frac{5}{4})^{t}$

Growth

Decay

Question 1 of 7

Is the following growth or decay?
$f(t) = 9(\frac{2}{5})^{t}$

Growth

Decay

Question 2 of 7

Is the following growth or decay?
$f(t) = 0.8(3.4)^{t}$

Growth

Decay

Question 3 of 7

Is the following growth or decay?
$f(t) = 7(0.9)^{t}$

Growth

Decay

Question 4 of 7

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

Initial population of 1200 birds that increases by 80% each year

Initial population of 1200 birds that decreases by 20% each year

Initial population of 1200 birds that increases by 0.8 birds each year

Initial population of 1200 birds that decreases by 0.8 birds each year

Question 5 of 7

Which of the following could be represented by $f(t) = 300(\frac{3}{5})^{t}$ ?

Initial value of $300 that increases by $ $\frac{3}{5}$ each year

Initial value of $300 that decreases by $ $\frac{3}{5}$ each year

Initial value of $300 that decreases by 40% each year

Initial value of $300 that decreases by 60% each year

Question 6 of 7

The value of water in a reservoir is depleting by 10% each year. If there is currently 12 $Km^{3}$ of water in the reservoir, how much water will there be after 4 years?

$0.0012 Km^{3}$

$7.87 Km^{3}$

$120,000 Km^{3}$

$7.2 Km^{3}$

Question 7 of 7