15% of the apples in a crate are rotten. there are 12 rotten apples in the crate.
how many apples are in the crate?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

(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.)

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?