I got 2.67 instead of 2.76, but I am guesssing that that's just a typo.a)What is vx?

I got a different answer to yours. We haveb)What is vyi?

a = -9.8

Δy=0

t=.55 (s)

vyi=?

Since we don't care about final velocity, use the equation and solve for

magnitudes of vectors can be found using triangles like this one. You know and . You wantc)What is the magnitude of the initial velocity, at an angle of 45 degrees?