hopefully this is right. You gotta find the y component of the velocity, so you would do sin(57) x 46 m/s. Then you get the y component speed. Then you need to find the total kinetic energy the object has, using the equation 1/2(mass)(velocity)^2. You don't have mass, but it will cancel out later anyway, so its ok.
So then you have the kinetic energy which is "blahblahblah(mass)" and you set that equal to (mass)(accel due to gravity)(height). The kinetic energy must equal the potential energy at the highest point.
So the masses from each side of the equation cancel out.
Then you get some number = (accel due to gravity)(height).
So then you divide the left by the accel due to gravity, and you get the height
sorry i don't have a calculator so i can't do the sin 57 part.