Please help, it’s kinda urgent

find a and d in f(x)=a cos(x)+d

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?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.