Find the area of the semicircle. Round your answer to the nearest whole number, if necessary. A semicircular object with a radius of 20 centimeters.

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Which expression is equivalent to 3^3 + 2^2?

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?