Can someone find the lengths of these? and show work?

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

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

During a wright loss challenge your friend goes from 125 pounds to 100 pounds. what was the percent weight loss