Find the area and the circumference of a circle with radius 8cm. Use the value 3.14 for π, and do not round your answers. Be sure to include the correct units in your answers.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.