Ked
he
8) Kristin left the science museum driving
toward the ocean one hour before Jack.
Jack drove in the opposite direction going
40 km/h slower than Kristin for five hours
after which time they were 570 km apart.
How fast did Kristin drive?
A) 35 kmh B) 80 km/h
C) 96 km/h D ) 70 km/h

(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.)