Please help me with this fast

For the function, f(x) = -5x 2, find f(-4).

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Two triangles can be formed with the given information. use the law of sines to solve the triangles. b = 49°, a = 16, b = 14