Answer:
400cm^2
Step-by-step explanation
equation: a+b/2 x h
19+25/2 x 20
44/2 x 20
22 x 20
440 (don't forget unit) and to square because we are finding the area
The average mileage covered per day is = number of miles / number of days.
The average mileage covered per day is =(x+y+z)/3
