PLEASE HELP ME ITS ALGEBRA THANK YOU

For what values of b will f(x)= logbx be a decreasing function? (16 )

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?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression