You are given

v = 80

v = 8*sqrt(h)

You want to find h. You can do that by solving for h

80 = 8*sqrt(h)

10 = sqrt(h) (divide by 8)

100 = h (square both sides of the equation)

The height needs to be 100.

______

We are not told the units. We suspect the height is given in feet.

v = 80

v = 8*sqrt(h)

You want to find h. You can do that by solving for h

80 = 8*sqrt(h)

10 = sqrt(h) (divide by 8)

100 = h (square both sides of the equation)

The height needs to be 100.

______

We are not told the units. We suspect the height is given in feet.