Solve for n: (or greater than or equal to or less than or equal to, use >= or 5n + 5 + 4

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.