21. The table below shows some values of a function
x f(x)
0 -24
1 -13
2 -4
3 3
4 8
5 11
6 12
7 11
8 8
9 3

Which of the following BEST shows the values in the domain when the function is increasing?
A. between 0 and 6
B. between 3 and 9
C. between 3 and 6
D. between 6 and 9

(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.)