Answer:
m = 300
Step-by-step explanation:

multiply both sides of the equation by 5

The answer is 4605 feet since 921 • 5 is 4605. There are 5 sides and each side 921 so 921 • 5 = 4605 would be the answer
If you looked it up online you could find it. look on safari
The 2 numbers required are 13*8 and 14 * 8
that is 104 and 117