Consider a circle whose size can vary. let r r represent the radius of the circle (in cm) and let c c represent the circumference of the circle (in cm). suppose the function f f determines the circumference of the circle in cm, c c, given its radius length in cm, r r. write a function formula for f f.

  f(r) = 2πr

Step-by-step explanation:

You know the formula for circumference in terms of radius is ...

  C = 2πr

You are being asked to write this as a function named "f". That will be ...

  f(r) = 2πr

Step-by-step explanation:

The formula for circumference of a circle is

where,

C represent the circumference of the circle.

r represent the radius of the circle.

It is the function f  determines the circumference of the circle in cm, C C, given its radius length in cm, r.

So, the circumference of the circle is defined by the function

Therefore the required formula for function f is .

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following