The surface area of a sphere is found using the formula sa=4πr^2, where r is the radius. if the surface area of a sphere is 64π square feet, what is the radius, in feet? a. 3 b. 18 c. 1 d. 4

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Tatiana wants to give friendship bracelets to her 32 classmates. she already has 5 bracelets, and she can buy more bracelets in packages of 4. write an inequality to determine the number of packages, p, tatiana could buy to have enough bracelets.