Over the last three evenings, Amy received a total of 122 phone calls at the call center. The second evening, she received 4 times as many calls as the third evening. The first evening, she received 10 fewer calls than the third evening. How many phone calls did she receive each evening?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

(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.)