Answer: C) 
Step-by-step explanation:
First we need to calculate the area of the square base.
This is 7*7 which equals 49 cm squared.
Plug this value into the formula of a square pyramid which will be
, now plug in the h, which is 9 cm.

Now solve.
V = 147 cubic cm.
Answer:
Solving
we get 
Step-by-step explanation:
We need to find solution of 
Solving the inequality:

Multiply 6 with terms inside the bracket

Subtracting 12 on both sides

Adding 4x on both sides

Divide both sides by -2 and the inequality will be reversed i.e < will be changes to >

So, after solving
we get 