CPM Homework Help : CC3 Problem 9-89

Determine the positive value that makes each equation true. If the answer is not a whole number, write it as a square root, and then approximate it as a decimal rounded to the nearest tenth.

If $x^{2} = 36$ , $x =\: ?$
Hint (a):
What number multiplied by itself is $36$ ?
More Help (a):
${\it x} = \sqrt{36}$
Answer (a):
$x = 6$

If $x^{2} = 65$ , $x =\: ?$
Hint (b):
Is $65$ the square of any whole number?
Answer (b):
$\sqrt{65}$ is approximately equal to $8.1$ .

If $x^{2} = 84$ , $x =\: ?$
Hint (c):
Is $84$ the square of any whole number?

If $x^{2} = 13$ , $x =\: ?$
Hint (d):
Is $13$ the square of any whole number?
Answer (d):
$x ≈ 3.6$