Answer:

Step-by-step explanation:
The formula of a surface area of a ball (sphere):

R - radius
We have R = 15in. Substitute:

If you want to get an approximation, then:

Answer:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
1
,
−
2
)
Equation Form:
x
=
1
,
y
=
−
2
Step-by-step explanation:
Graph.
y
=
3
x
−
1
y
=
x
+
1
y
=
−
x
−
1
y
=
x
+
1
H(2)=x²=2²=4
G[H(2)]=G(4)=3(4)+2=12+2=14
F[G[H(2)]]=F(14)=2(14)-1=28-1=27
Answer: F[G[H(2)]]=27