Question

8. Over two summers, Ray saved $800.00 and $600.00. The polynomial represents his savings at the beginning of the third year, where x is the growth factor. (The interest rate r is x – 1.) What is the interest rate he needs to save $1,650.00 after the third summer?

800x2 + 600x (1 point)

a. 0.1% b. 10.9% c. –285.9% d. 1.1%

Answer 1

800x^2 + 600x - 1650 = 0, has roots
x = 1.1093

r = x - 1 [given from question]
r = 1.1093 - 1 = .1093 = 10.93%

Answer 2

ya? make sense?

Answer 3

Yea what he said, I overlooked that last part.

Answer 4

Thank you for your help!

Answer 5

ur welcome