Answer:
Explanation:

Now for some explanations.
- sqrt(90)/sqrt(20) can be put under 1 square root sign.
- When you do that, 10 divides into both numerator and denominator.
- The sqrt(9) = 3
- The square root of 2 cannot be reduced, but you can rationalize it by multiplying top and bottom by sqrt(2)
3 sqrt(2)
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sqrt(2)*sqrt(2)
Answer
3 * sqrt(2)
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2
I think it be, option b. weather of the day
Answer:
Black holes are formed when giant stars explode at the end of their lifecycle. This explosion is called a supernova. If the star has enough mass, it will collapse on itself down to a very small size. Due to its small size and enormous mass, the gravity will be so strong it will absorb light and become a black hole.
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Explanation: I hope this is good</h2>