Use the Pythagorean theorem:
2)

4)

It's (4,2). Can you comment why you're having a struggle with this? I might be able to help you.
Answer:
A. 5^20 x 7^40
Step-by-step explanation:
The exponent outside applies to each factor inside parentheses. The rules of exponents say ...
(a^b)^c = a^(b·c)
so, you have ...
