Question 624013
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