If triangle abc is congruent with triangle def the length of side de is:

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?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Factor and solve to find roots x squared -x - 90 =0