Geometry
posted by Jenny .
Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth.
would this be 3.14*2*4.2ft?

This is a little tricky.
Let R = the radius
Let Pi = 3.14 as stated.
The circumference is (Pi)(2)(R)
The problem already calculates (2)(R) for you as 4.2 ft.
So,
circumference = (Pi)(4.2)
or
=(3.14)(4.2) ft.
Multiply and round as requested by the problem. 
No wonder I kept getting a weird answer thank you for clarifying for me...

Your welcome!
Glad to help. 
(3.14)(4.2)=13.188
would I round that to 13.19? 
No, the problem requests to the nearest tenth which would be:
13.2 ft.
Also, don't forget the units. 
ok thank you u r a lifesaver