The mean of 17 observations is 30, three observations 20, 30, and 40 are deleted and one
observation 90 is included. Then, find the means
of the final observations.

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?