Lena found the greatest common factor (gcf) of 24ab2c3 and 30a2b3c2 to be 6abc2 by using these steps: step 1: gcf of 24 and 30 is 6 step 2: highest shared power between a and a2 is a step 3: highest shared power between b2 and b3 is b step 4: highest shared power between c3 and c2 is c2 in which step did lena make a mistake? options: step 1 step 2 step 3 step 4

(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.)