What is the length of the arc on a circle with radius 16 ft intercepted by a 60 degree angle

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

In which form is the following function written? y = - 2(x – 3)(x + 5)

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28