book Maths Puzzle Numerical Ability

I would like help with problem #48 in my text book. I'm not really sure how to type or symbolize a radical sign on this, so "sqrt" will be the same as a radical sign. This is the

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book Other Question

I need to figure out the parabola of a corner kick. The distance from the corner to the player in the field is 45 feet. The person is 5 1/2 feet tall. I am looking in my book an I am having trouble solving this inequality. Please help me. Thanks

-6 < 5y - (2y - 9)