A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.880 m/s at an angle of 36.8° above the table, and it lands on the magazine 0.0750 s after leaving the table. Ignore air resistance. How thick is the magazine? Express your answer in millimeters.

hf=Vi*sinTheta*t-4.9t^2

you are given Vi, Theta, and t.
solve for heightfinal (hf)