Zach throws a ball upward so that it follows the equation y = -16x² + 64x + 5 where y is the height of the ball
and x is time. How many seconds until the ball reaches its maximum height? Hint: look at its table. (Help ASAP pls)

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?