I need help pleaseee Operations with Polynomials

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

Three friends are comparing the prices of various packages of golf balls at a sporting goods store. hector finds a package of 6 golf balls that costs $4.50.