Find the surface area of a sphere with a radius of 5 cm. Approximate x as 3.14 and round your answer to the nearest hundredth.
A. 62.80 cm
B. 314.00 cm?
C. 523.33 cm
D. 1,570.00 cm

Pls! does anybody know a shortcut for answering these types of questions in the future?

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?