Please help me I can't figure this out.

If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it take the baseball to hit the ground? use the equation h = −16t2 + 64t + 4.

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on