Professor Baker wants to mix a solution containing 15% acid with one containing 20%
Nacid to obtain a 25-ounce solution containing
16% acid. How many ounces of the 15% solution
should the professor use?
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Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?

(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.)

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42