Question

if z^2 is directly proportional to x^3 and z=8 when x=4, find the value of z when x=9.

Answer 1

Step-by-step explanation:

Given that

z^2 directly proportional to x^3

z = 8 , x =4

Find z=?

when.x =4

Solution

z^2 = kx^3

8^2 = k (4)^3

64 = k (64)

k =1

put in equation

z^2 = 1 (4)^3

= 64

taking under root we get

z = 8