If point c is the midpoint of segment ab, which statement is true?
a)segment ab is one half the length of segment cb.
b)segment ac is longer than segment cb.
c)segment ac is one half the length of segment cb.
d)segment ac and segment cb are equal in measure.

(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.)