It's A because 7.5 is the starting point but it's not included so that point is circled.
Your answer is going to be 5.2
It is A because you have to divide by a negative one
There are two constants, across the level of competition: 120 yards (360 feet) of length and 53 1/3 yards (160 feet) of width. The playing field is 100 yards long, with a 10-yard-deep end zone on each side. In total, a football field covers 57,600 square feet, or the equivalent of 1.32 acres.
Density = mass/volume
Let mass=x
8.94= x/(10*45*.2)
X=8.94*90
Mass=804.6 g
Hope this helped :)