Calculate the average of 200 and 300

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?

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Can someone me with my hwplz(only the circled ones)