Walt has a box of 80 postage stamps. the box contains 16 stamps featuring the bald eagle and 40 stamps featuring the stars and stripes.

if walt randomly chooses a stamp to paste on an envelope, what is the probability that the stamp features the bald eagle or the stars and stripes?
a) 0.30
b) 0.50
c) 0.70

d) 0.80

If the table of the function contains exactly two potential turning points, one with an input value of –1, which statement best describes all possible values of m? m ≥ –12 –12 < m < 4 m ≤ 4 m ≥ 4 or m ≤ –12

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin. how many doctors use brand x aspirin

(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.)