Question

Use x=1+r, where r is the interest rate paid each year. Write a model polynomial, C(x), that represents the final amount of an 8-year investment if $500 was deposited at the beginning of the first year, $800 was deposited at the beginning of the fourth year, and an additional $370 was deposited at the beginning of the eighth year. (1 point)

1. C(x)=500x+800x^5+370x^8
2. C(x)=500x^8+800x^5+370x
3. C(x)=500x+800x^4+370x^8
4. C(x)=500x+800x^4+370

Answer 1

The correct answer is:

3. C(x) = 500x + 800x^4 + 370x^8