Across section is cut from a brass cylinder with walls that are 2 centimeters thick. the radius of the cross section, measured to the outer portion of the ring, is 5.5 centimeters. what is the maximum volume of a ball that could pass through the interior of the brass ring?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !