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.

Question

C(x) = 500x + 800x^5 + 370x^8

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

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

C(x) = 500x^8 + 800x^5 + 370x

Answer 1

C(x) = 500x + 800x^4 + 370x^7