Give that V=πh²(r-h/s), express r in terms of v, h and π

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

What are the sotions to the quadratic equation 9x^2=4

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?