Arunner runs 8 miles in 92 minutes. what is the runners unit rate?

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

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Ineed me i stuck and i don’t want to get it wrong