john does situps everyday. on monday he did 20 situps .on tuesday he did 30 ,he did 50 sit ups on wednesday, and 90 on thursday. if he continues this pattern. John will do an impressive number of sit ups on saturday. how many total situps will John have done by the end of the day on saturday?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Which of the following will form the composite function?