Exercise #4: kirk has 12 dollars less than jim. if jim spends half of his money, and kirk spends none, then
kirk will have two dollars more than jim. how much money did they both start with? remember to use “let’s” statements to solve your equation.

How do you determine if an ordered pair is a solution to a given equation?

(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.)

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?