Answer:
S=100x^8y²z^6 is your answer
Step-by-step explanation:
we have
S=4πr²
when
r=5x⁴yz³
new S
will be
S=4π(5x⁴yz³)²=4×5²×x^(4×2)×y²×z^(3×2)
=100x^8y²z^6
