How do i solve for A=1/2πr2 (for π)

The net price equivalent rate of 3/7/13 is:

Lawrence drives the same distance monday through Friday commuting to and from work. Last week Lawrence drove 25 miles on the weekend for a total of 60 miles for the week. Find the distance Lawrence drives each day commuting to and from work

If you are asked to find 621 / 59 how do you know the quotient will be greater than 10 before you actually divide?

A school sold small and large boxes of fruit as a fundraiser. One student sold 5 small boxes and 13 large boxes for $232. Another student sold 12 small boxes and 7 large boxes for $218.

Simplify each expression. 2d (3)

A triangle has sides of square root of 2 and 3. Which could not be the length of the third side if it is a right triangle?

How many ounces of pure gold are in an 18 karat gold chain that weighs 2.8 ounces?

A salsa recipe uses green pepper, onion, and tomato in the extended ratio 1:3:10. How many cups of onion are needed to make 56 cups of salsa?

A dog pen 10 ft by 30 ft is needed. You need to decide how much fence is needed. What concept is used to solve the problem?

Mr. De Leon's Geometry class has 34 students. After lunch everyone returns to the classroom. Within an hour, each person produces 800 BTUs. The room is 25 feet by 32 feet by 12 feet. How many BTUs per cubic foot were produced?