There are 52 weeks in 1 year. how many years are equivalent to 520 weeks?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

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