X equals 18. This might not be correct
f(x) cannot be 0 or less than zero, but can approach+ infinity
Answer is (0, ∞)
For #1
city A's mean would be 10.5, then you would divide it by the number of numbers there is which is 5,So 10.5/5 is 2.1
city B's mean would be 11.6 then you would divide it by the number of numbers there is which is 5, So 11.6/5 is 2.32.
thats all I have don't know how to do #3 sorry
Answer:
41.25 minutes i think sorry if its wrong