Exponential Equations

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What was the population in 1990? 

• 0 people

• It doesn't say

• I don't know

• 6191

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What percent did the population increase each year?

• 4%

• It doesn't say

• I don't know

• 400%

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x

• y = 15(0.35)^x

• y = 15(1.35)^x

• y = 35(1.15)^x

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 mosquitoes will there be after 4 months?

• 9765

• 9006

• 5433

• 9766

Simplify the exponential expression:

• 10x^-2

• 2x²

• 2x¹²

• 10x¹²

Solve:
16^x-3 = 8^x-3

• 9

• -3

• 0

• 3

Solve:
2^4x+1 = √2

• -1/8

• 1/8

• 0

• -1/4

6^{-2  =} 

• 12

• -36

• 1/36

• 1/6

Solve:
3^x-2 = 27^4x

• -2/11

• -2/3

• 2/11

• 2/3

Does this graph represent exponential growth or decay?

• Growth 

• Decay

• cannot be determined