A ball is thrown eastward into the air from the origin (in the direction of the positive x-axis). The initial velocity is $60 i + 64 k$, with speed measured in feet per second. The spin of the ball results in a southward acceleration of $4 ft/s^2$, so the acceleration vector is $a = −4 j − 32 k$. How far does the ball land from the origin, and what is its angle and speed when it hits the ground?
I got 186.6 ft from the origin, and I'm pretty sure I just need to plug the time into the velocity function and find the norm of it to get its speed. I don't know how to go about solving the angle, though.