A sample of 64 is taken from a population, with the mean of the sample being 119 and the standard deviation of the sample being 16. What is the 99.7%
confidence interval for the mean of the population?
A. (117, 121)
B. (118, 120)
C. (113, 125)
D. (115, 123)

The diameter of a ball is 8 in. what is the volume of the ball? use 3.14 for pi. enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

We just started the introduction into circles and i have no idea how to do this.

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?