For full credit, you must show All your work and Explain All your answers! Point values given are those I will use If I choose to grade that problem1. In Project 1 this Fall you studied Recording Times in minutes for Dr. Marion's Sample of 28 Recordings of Mahler's 9th Symphony, which are:80 82 78 80 89 87 79 90 84 88 81 81 81 86 85 77 84 77 82 85 81 91 82 86 86 89 70 81h. If µ = 85 and σ = 5, find the probabilities that the:i. Mean Recording Time of 64 Recordings exceeds 84'30".ii. Total Recording Time of 100 Recordings exceeds 6 daysI. Using σ = 5, how large a Sample would we need in order to estimate Mean Recording Times for Mahler's 9th Symphony to a:i. 95% Error Margin of 2 minutes?ii. 99.5% Error Margin of 48 seconds?iii. Compare your answers and explain their difference.

Beatrice decides she wants to babysit a few children at the same time to earn the money faster. she tells parents that if they allow her to babysit their children at her house, she will eliminate her automatic $5 tip and will give them an additional $5 discount. (a) write an equation showing the total cost for each client. identify all variables. (b) four parents bring their children to beatrice’s house at the same time for babysitting. beatrice wants to find out how many hours she must babysit the 4 children to earn exactly the $100 she needs in order to buy the present for her mother. write and solve an equation to find the number of hours. justify each step in the solution. (c) one parent decides not to drop off her child. the remaining 3 parents drop their children off at 9 a.m. two of the parents say they will be back at 1 p.m. the third parent says she will pick up her child at 2 p.m. at noon, beatrice realizes she needs feeding the 3 ch

Can some one me with these questions

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent