Whats the circumference of a circle with a diameter of 12ft

Let me tell you a secret!
You know how the formula for Circumference is 

C = 2πr

Where r is the radius? 

The reason why this formula works the way it does is because of what π IS. 

π is the ratio of ANY circle's Circumference to it's Diameter.

So you can think of π like this: 

Circumference / Diameter.
2r is the same as the diameter. So what you are doing is canceling out the diameter. Similar to what you do in algebra I to solve for x. Then you are just left with the circumference. That's pretty neat!

So, let's get to it!

2πr

Sadly, you'll most likely need to use a calculator for this problem, but if you are not permitted one then replace π with 3.14. 

What is r?
r = diameter / 2

r = 12 / 2
r = 6

2π6

If you are allowed to use a calculator then plug it in to it. If not then start doing some long multiplication!

37.699ft

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.