Pure acid is to be added to a 10 % acid solution to obtain 21 L of a 40 % acid solution.

Cylinder has a height of 14 centimeters and its circle bases have a radius of 10 centimeters. find the surface area of the cylinder.

How are the ordered pairs (4,9) and (4,-9) similar, how are they differ?

Y=8x+25, where x is hours. what is the y-intercept

A box with a square base of side a is three times higher than its width. Express the volume V of the box as a function of a. V (a) = ?

Karen has some lawn chairs. Jenny has twice as many lawn chairs as Karen, and Rico has 3 more lawn chairs than Karen. Together, they have a total of 31 lawn chairs. How many chairs does Karen have?

Denise put $95 into an account that pays 5.2% interest, compounded monthly. According to the rule of 72, approximately how long will it take for her money to double?

What is the percent change between 20% and 30%

What is the recursive rule for this geometric sequence? 3, 3/2, 3/4, 3/8

What is two plus three?; )

The regular price of a calculator is $15.40. it goes on sale for 30% off the regular price. what is the amount of savings on the calculator