Question 1

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. Which function gives the number of mosquitoes as a function of number of months?

Accepted Answer

$P(t)=4000 	imes (1.25)^t$

Answer

$P(t)=4000 	imes (25)^t$

Answer

$P(t)=4000 	imes (125)^t$

Answer

$P(t)=25000 	imes (1.4)^t$

Question 2

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitos will there be after 4 months.

Accepted Answer

9,770 mosquitoes

Answer

8,000 mosquitoes

Answer

100,000 mosquitoes

Answer

4,250 mosquitoes

Question 3

The value of a $55,000 car decreases by 20% each year. Which function gives the value of the car after x years?

Accepted Answer

$y=55000(0.8)^x$

Answer

$y=55000(-20)^x$

Answer

$y=55000(0.2)^x$

Answer

$y=55000(1.2)^x$

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