Acircle has a diameter of 15 feet. what is the circumference of the circle? (express your answer using π.)
a.15/π ft.
b.15π ft.
c.30π ft.
d.π/15 ft.
me plz, i need this asap!

Find the value of the cosine for angle a

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Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.