Answer:
The area of the surface is the sum of all given areas.
Step-by-step explanation:
Adding Z to R,
(X^2 + Y^2) + (X^2 - Y^2 + 64) <= 64
"<=" represents "less than or equal to"
Opening brackets,
X^2 + X^2 + Y^2 - Y^2 + 64 <= 64
2X^2 + 64 <= 64
Divide through by 2;
X^2 + 32 <= 32
Hence X squared is less than or equal to zero.
