A charitable fund's balance is modeled by y = -4.1x2 + 7.1x + 145, where y is the balance and x is the years after 1996. If no money is added to the fund, in how many years will the fund have a balance of 0? Round to the nearest year.
A. 6 years
B. 7 years
C. 8 years
D. 9 years

Question

A charitable fund's balance is modeled by y = -4.1x2 + 7.1x + 145, where y is the balance and x is the years after 1996. If no money is added to the fund, in how many years will the fund have a balance of 0? Round to the nearest year.
	A.	6 years
	B.	7 years
	C.	8 years
	D.	9 years

hoblos · Answer

-4.1x2 + 7.1x + 145 =0
you just have to solve this quadratic to get x=7 => B

anonymous · Answer

i got 6.8,so round off get 7.because in unit of year.

anonymous · Answer

am i right?