Question

C(r), the circumference of a tire, is based on the radius, r. What is an appropriate domain for the function? A) all integers B) all real numbers C) all whole numbers D) all positive numbers

Sorry about my previous question that was my friend playing on my computer

Answer 1

Domain will be all positive numbers.

Therefore Option D is correct.

Explanation:

A tire is of circular shape so the circumference of a circle we know which is:

`C=2\pi r`

Where, C is circumference,, r is radius

So, Here the circumference of tire will also be:
`C=2\pi r`

Domain is the value that x will take

And here r is corresponding with r.

So, radius cannot be negative,

So, Domain will be all positive numbers.

Therefore Option D is correct.