PLEASE HELP PLEASE IM DESPERATE 6. Jean hasn't played tennis in awhile and wants to work on his first serve. His first serve
percentage is 64%.
a) Jean hits 10 first serves. Find the probability that he is successful on exactly 8 first
serves.
b) Jean hits 20 first serves. Find the probability that he is successful on 12 or less first
serves.
c) Jean hits 50 first serves. Find the probability that he is successful on more than 30 first
serves.
d) Jean hits 100 first serves. Find the mean and standard deviation of this practice session.

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size. it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?