In a local community, assume ages are normally distributed with a standard deviation of 20. In order to estimate the average age of people in the community, the following sample is taken: 78, 63, 75, 42, 55, 70, 68, 62, 53, 49. The mean of these data is 60.50. The lower bound of the 95% confidence interval for the mean age is 48.10. What is the upper bound for the 95% confidence interval

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

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?

Which value of y will make the inequality y< -1 false?