Evaluate c = 2 *pi symbol* r , for r = 8.
a: c = 10 *pi symbol*
b: c= 16 *pi symbol*
c: c = 28 *pi symbol*
d: c = 16
answer asap im taking a test

Achild has a box full of colored building blocks. she will choose one block without looking. the odds against choosing a blue block are 4/7. what is the probability of choosing a blue block? amanda is playing a role-playing game with her friends. she will roll dice to determine if her character unlocks a treasure chest. the probability of her character unlocking the treasure chest is 13/20. find the odds in favor of her character unlocking the treasure chest.