Whats 1+1 because i think its 11

What is the approximate circumference of the circle shown below?

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

Michelle had a birthday party. she bought a bag of candy with 96 starbursts, 72 hershey's, and 68 reese's. she wants to use all the candy she bought to make goody bags with the same amount of starbursts, hershey's and reese's in each bag. what is the largest number of bags she can make?