Please Decrease £16870 by 3%
Give your answer rounded to 2 DP. i really need the answer

Ineed if you could explain and give me the answer you! this needs done

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?

Find the cosine function that is represented in the graph.