1. Problem Statement: A fixed cannon is to fire a projectile at a tank moving toward the cannon at 40 mph. If the cannon is to fire at the moment the tank is 8 miles from the cannon, and the muzzle speed of the projectile is 1000 mph what is the correct equation to determine the firing angle? 2. Relevant Equations: Acceleration of gravity: 79000 m/h^2 3. Solution Attempt: Initial conditions: r=<8-40t,0> v=<1000*cos(theta), 1000*sin(theta)> started with: acceleration_projectile=<0,-g> <0,-79000. velocity (took integral and used initial conditions to come up with constants) v=<1000*cos(theta), -79000t+1000*sin(theta)> position: r=<1000*cos(theta)*t+t-40t, -79000t^2/2+1000*sin(theta)t> **The answer I'm supposed to get is (3.16*cos(theta)+0.127)*sin(theta)=1 Any help would be greatly appreciated.