The system of equations that represent the matrix is c
Just multiply directly numerator with numerator and denominator with denominator
Solve for any of the variables; for instance,
:


Then

Let
; then the intersection is given by the vector-valued function

or

Answer:
267.9 feet^3
Step-by-step explanation:
V = 4/3πr^3
4/3 * 3.14 * 4^3 = 267.946666