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.

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

step-by-step explanation: