(8/9)^2 is 64/81. Exponent is 2. Hope this help
Answer:
The graph of a relation must pass the vertical line test.
True
Answer:A 12 m3
Step-by-step explanation:
100% correct
Answer:

Step-by-step explanation:
Given
y jointly varies to x and z^2
Required
Find the equation
We start by writing out the variation;

Write as equation

Substitute values of x,y and z



Divide both sides by 7




Substitute k in 
