Question

Over two summers, Ray saved $800.00 and $600.00. The polynomial 800x2 + 600x 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?

Answer 1

So, Start by simplifying the original equation.
800x^2 + 600x = 1650

You get

800x^2 + 600x - 1650 = 0

16x^2 + 12x - 33 = 0

When you solve the equation, You'll get some x value,

Subtract this x from 1

x-1 = your answer

Let me know if you can't figure it out.

Answer 2

i still don't get it

Answer 3

The answer or how to solve it?

Answer 4

So when you solve the polynomial (16x^2 + 12x - 33 = 0) You get x is 1.109.
Now subtract 1.109 from 1 and you get---------->

.11%

Answer 5

Which is about the same as .1%