<u>Part 1</u>
<u />
We need to make sure the radical is defined, meaning the radicand has to be non-negative. Thus, the domain is 
<u>Part 2</u>
<u />
We need to make sure the radical is defined, meaning the radicand has to be non-negative. Thus,

Thus, the domain in interval notation is 
Answer:
C
Step-by-step explanation:
Answer: B
Step-by-step explanation:
Step-by-step explanation:
7x + 3x + 90= 180
10x= 180-90
10x= 90
x= 90/10
x=10
<span> (5^3)^−2 = 5^-6 = 1/(5^6)
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