HEY CAN SOMEONE DO NUMBER 1 FOR ME ONLY??? ILL GIVE BRAINLIEST IM RUSHING

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8