Question

Only 17 plz rlly need help plz bro

Answer 1

The question GIVES us an equation: 

V₀ = √(v² - 64h) .

It TELLS us that v should be 100 ft/sec and h is 150 ft.
All we have to do is plug the numbers into the equation,
and then do the arithmetic to find V₀.
There's not even any Physics to do.  Only arithmetic.

V₀ = √(v² - 64h)

v = 100 
h = 150

V₀ = √(100² - 64·150)

V₀ = √(10,000 - 9,600)

V₀ = √400

V₀ = 20 ft per sec .