Find the surface area and volume of a cylinder with a diameter equal to 14 cm and a height equal to 10 cm.

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?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

How do i do this? i don’t understand