Exponential Function Word Problems

Front

Value of land purchased for $30,000 in 1960, increased by 5% per year. Approximate value in 2011?

Back

$361,223

Front

An adult takes 400 mg of ibuprofen. Each hour, the amount of ibuprofen in the person’s system decreases by about 29%. What is the multiplier for this problem? Options: 1.29, .71, .29, 1.71

Back

.71

Front

Caffeine decrease: 120 mg to 10 mg at 12% per hour. How long?

Back

19 to 20 hours

Front

The foundation of your house has about 1,200 termites. The termites grow at a rate of about 2.4% per day. How long until the number of termites doubles?

Back

29 to 30 days

Front

Is this exponential growth or decay?

Back

Decay because b=0.5

Front

Pick the equation that is exponential growth: y=2(0.5)^x, y = 0.5(2)^x, y = .5x - 2, y = 2x + .5

Back

y = 0.5(2)^x

Front

Equation for bacteria culture starting with 5000 cells, dying by 30% each year.

Back

y=5000(0.7)^x

Front

Equation for Samantha's hair growth: Initial length = 6 in, Growth rate = 14% per week.

Back

y=6(1.14)^x

Front

You buy a new computer for $2100. The computer decreases by 50% annually. How much is it worth after 2 years?

Back

525

Front

Starting term for the function: f(x) = 300(1.16)^x?

Back

300