Find the value of x

PLEASE HELP

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

What is the frequency of the sinusoidal graph?