Multiplication :))
it’s the order of operations!
So C= dxpi or rx2xpi= c in this case 7x 2 = 14 is diameter do E D and A finds the diameter and the rest do not
Answer:

Step By Step Explanation:
Simplify 

Rewrite Equation

Simplify 

Answer:
10:17
Step-by-step explanation:
If I am making a ratio of the tickets Cindy sold to the number of tickets sold in all it would be 40:68 but I would have to simplify and 40 divided by 2 = 20 and 68 divided by 2 = 34 then I would divide them both by two again to get our answer of 10:17! Hope this helps! Have a great day!