Solving the equation:
2x+1+3=0
2x+4=0
2x+4-4=0-4
2x=-4
2x/2=-4/2
x=-2
Therefore, the student that concluded x=4 is incorrect.
Answer: V = 1,436.03 cubic meters
Step-by-step explanation:
V = (4/3)(3.14)(r^3)
V = (4/3)(3.14)(7^3)
V = (4/3)(3.14)(343)
V = 1,436.03