You need to divide-4 on both sides which will get you 8.hope this helps
Answer: the length of the base is 15 kilometers.
Step-by-step explanation:
formula : Area of parrallelogram = Length of base x height
Given: Area of parallelogram = 300 square kilometers
height = 20 kilometers
Substituting values in the formula , we get
300 = Length of base x 20
Length of base = 
= 15 kilometers
Hence, the length of the base is 15 kilometers.
C is irrational because there is no definite square root for 15 whereas the square root of 36=6
Answer: (-0.0549,-1.0732)