Exponential Context

Jamie's podcast has 1,400 subscribers. The number of her subscribers is increasing at a rate of 5.9% each week. Which function would represent her followers after w weeks?

• y = 1400(1.059)^w

• y = 105.9(1400)^w

• y = 1400(1.59)^w

• y = 1400(5.9)^w

Given the equation 50 = 10*1.03^t, what is t?

• t = 54.448

• t = .018

• t = 19.435

Alex puts $200,000 into the bank. It gains 5% interest every year. How long will it take to double his money?

• 2 years

• 14.2 years

• 14.2 months

• 20 years

Samantha purchased a car for $40,000 and loses 15% value every year. How long does it take for her vehicle to be $20,000?

• 4.265 Years

• .234 years

• 38 months

A medication diminishes in the blood stream by 4% every hour. What is the half-life of the medication?

• About .06 hours

• About 4 hours

• About 24 hours

• about 17 hours

Sam invested $30,000 into a stock that historically shows 7% annual growth.

How much is that stock valued at after 14 years?

• $77,000

• $75,000

• $77,356