100 pt question
leo and melody go to school together. there are 800 students total in their grade. out of the 6 periods they have, they can only be in 2 periods together max. what is the percent probability that leo and melody are in a class together?

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)