Answer:
SA = 4.91 in²
Step-by-step explanation:
A ball is a sphere, and the surface area of a sphere is
If our diameter is 1.25, the radius is half of that at r = .625
Filling in, we have
SA = 4(3.14)(.625)² and
SA = 4(3.14)(.390625) so
5,577,000
Im not sure
x=-2, y=2
-8x +4y=24
-7x+7y=28
substitute 4y=24+8x
y=6+2x in second equation and hence we find X=-2
put value of X in either equation and get value of y=2