Adrian is going to invest in an account paying an interest rate of 6.5% compounded quarterly. How much would Adrian need to invest, to the nearest hundred dollars,
for the value of the account to reach $3,900 in 14 years?

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters