What is x?
(4/5)^x=64/125

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.