Jon makes $78 in 12 hours of work for his mom. how much would jon make in 20 hours of work

Plz i want answer and i would appreciate it is is a b c or d

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)