What is the coefficient in the following expression?
5a– 7

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

(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.)

Can someone me with my math problem pls my teacher is on my back about this