(im dumb-o and i need the -o) howdy do! in your own words, can you explain to me what histograms are? ! i'm kinda confused on all of it !

Given tan∅=4/3 and π< ∅< (3π)/2; find cos2∅ a. -24/25 b. 24/25 c. -24/7 d. -7/25

For each proportion find the unknown number x 1/5/8=×/15

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?