(5) you bought a magazine for $5 and four erasers. you spend a total of $25. how much did each eraser cost.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

(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.)

Five infinity stones cost $16.80. what is the price per infinity stone ?