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

Domain will be all positive numbers.

Therefore Option D is correct.

Step-by-step explanation:

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

Where, C is circumference,, r is radius

So, Here the circumference of tire will also be:

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.

it would be 6xy and -16xy.

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i ran through it by the other answer is wrong