√(5-b)^8 simplifying radicals

please explain your answer too so i can understand how you did it

  (5 -b)^4 = b^4 -20b^3 +150b^2 -500b +625

Step-by-step explanation:

The applicable rules of exponents are ...

  √a = a^(1/2)

  (a^b)^c = a^(bc)

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You have √((5-b)^8) = ((5 -b)^8)^(1/2)

  = (5 -b)^(8/2) = (5 -b)^4

Sometimes, "simplify" means "remove parentheses".

  (5 -b)^4 = b^4 -20b^3 +150b^2 -500b +625

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

2.83941151 would be the answer you're looking for! : )