If r is the radius of a circle and d is its diameter, which of the following is an equivalent formula for the circumference c=2πr?
a. c=2πd
b. c=πd
c. c=πr2
d. c=πdr

Option B is correct

C=πD

Step-by-step explanation:

As per the statement:

If r is the radius of a circle and D is its diameter.

Given the circumference of the circle:

            .....[1]

where,

r is the radius of the circle.

We know that:

diameter(D) = 2r

Substitute in [1] we have;

Therefore, the equivalent formula for the circumference C=2πr is, C=πD

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

what is

step-by-step explanation: