How do you find the diameter of a circle?

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

Acircle has a circumference of 28.36 units what is the diameter of the circle

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)