Five years ago, Ruth made a deposit of $500 into a savings account that pays simple interest. She made no further deposits, and now her account is worth $750. What was the rate of interest per year?

How do I work this out? 7/9x5 2/5

Angela's coffee shop brewed seventy-one liters of coffee everyday for a week. The shop is open for 16 hours everyday. How many liters of coffee did they brew for the whole week? Write an expression.

The numerator and denominator of a fraction are in the ratio of 3 to 5. If the numerator and denominator are both increased by 2, the fraction is now equal to 2/3.

The human eye contains "rods", primarily responsible for night vision, which have an approximate diameter and length of 2.0 x 10^-7 meters and 4.0 x 10^-5 meters respectively. What is the approximate volume of the solid?

Approximate the solution to 2cos (x/2) > = 1/4 for 0< = x<=2 pi.

What is the degree measurement of five thirds of a right angle

There are 500 sheet of paper in the pack Hannah bought. She has used 137 sheets already. How many sheets of paper does Hannah have left?

A record label uses the following function to model the sales of a new release. a (t) = - 90t 2 + 8100t The number of albums sold is a function of time, t, in days.

A food company distributes its tomato soup in two cans of different sizes. For the larger can, the diameter has been increased by 30%, and the height remains the same.

A machine produced 75 widgets an hour. How many does it produce in 6 minutes