to find the hypotenuse (or the ramp in question 4) you can use the equation
[tex]a^{2} +b^{2} =c^{2}[/tex]
with a and b being the 3 feet and 9 feet and c being the unknown (ramp).
So if you plug 3 and 9 into the equation, it looks like this.
[tex]3^{2} +9^{2} =c^{2}[/tex]
then square them.
[tex]9+81=c^{2}[/tex]
simplify.
[tex]90=c^{2}[/tex]
take the square root of both sides.
[tex]\sqrt{90} = c[/tex]
[tex]\sqrt{90}[/tex] is approx. 9.5 so the answer would be H.
