# ALGEBRA 2 HELP PLEASE!1?

1. A jet ski depreciates at 11% of its original value each year. If the jet ski was $8000 at its time of purchase, what is the value of the jet ski after 5 years?

2. A bacteria culture begins with 4 bacteria which double in size every hour. How many bacteria exist in the culture after 8 hours?

3.If $360 is invested at an interest rate of 4% per year and is compounded quarterly, how much will the investment be worth in 18 years?

4.If a hospital patient is given 50 milligrams of medicine which leaves the bloodstream at 10% per hour, how many milligrams of medicine will remain in the system after 6 hours? Use the function A(t) = Iert.

5.If $535 is invested at an interest rate of 6% per year and is compounded continuously, how much will the investment be worth in 10 years?

### 1 Answer

- Anonymous9 years agoFavorite Answer
I answered the first problem for you.

1. y = abⁿ

Since "a jet ski depreciates at 11% of its original value each year", we let b = 0.89. We also let a = 8000 and n = 5. Simplifying the expression yields approximately $4467.25.

Refer to this link to answer your exponential growth and rate problems: http://www.regentsprep.org/regents/math/algebra/AE...

I hope this helps!

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