SOLUTION: Suppose w varies directly as the square of z. If z decreases by 5%, findtte percentage change in w.

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Question 624013: Suppose w varies directly as the square of z. If z decreases by 5%, findtte percentage change in w.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose w varies directly as the square of z.
w = z^2
:
If z decreases by 5%, find the percentage change in w.
Let 1 = original value of z, now the value of z is .95
w = .95^2
w = .9025
:
Find the percentage change
1 - .9025 = .0975 * 100 = 9.75% change