this is approximately 6 to 200
divide both by 2
3 to 100
3 to 10^2
3 out of 100
She can type 4,800 words in one hour.
ANSWER

EXPLANATION
The given function is

This function is defined for values where the denominator is not equal to zero.


The domain is

Or

A = 10 or a = -10
When you square a number, you're essentially multiplying it by itself.
Recall that multiplying two negative numbers will result in a positive numbers. Knowing this, we know that -10 times -10 equals 100.