Tony is going to put $900 in a savings account that earns 3.2% simple interest. he will leave the money in there for 4 years. how much money will he earn in interest? what will his account balance be at the end of 4 years?

Your answer would be $115.20 for your interest in all. His account balance would be $1015.20 at the end of four years.

I got this answer by first multiplying 900 times .032. I got the .032 by saying that 3 percent is .03, and .2 percent is a .002. .032 would be that percentage in a decimal version. I got 28.8 from that, so that would be your simple interest. Multiply that by four for your total interest together, and add 900 to it to get your answer.

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2