The formula for the circumference c of a circle with radius r is c = 2πr. which of the following is a formula for π (pi) of the circle in terms of the circumference and radius?

a. pi=c+2r
b: c-2r
c: pi=2r/c
d: pi/c/2r

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Find the zeros of each function. f(x) = x^2 + 5x - 6

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)