Steve usually buys four books a month for the same price. Every August, his favorite bookstore holds a back-to-school sale and everything in the store is priced at 10 percent off. Steve takes advantage of the sale by buying six books in August. What happened to the amount of money that Steve spends on books in August, compared to other months?

The amount of money spent by Steve in August is 135% of the amount spent in other months

Step-by-step explanation:

Let the price of each book bought be x

Therefore amount spent on books by Steve in every other month = 4x

In August price of books is 0.9x and Steve bought 6 books.

Therefore amount spent by Steve in August = 5.4x

Therefore difference between amount spent by Steve in August & every other month = 5.4x - 4x = 1.4x

Therefore percentage increase of amount spent in August

(1.4x ÷ 4x) × 100 = 35%

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.

step-by-step explanation: