What is expensive profit

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Solve the problem by using a venn diagram a group of students were surveyed about their taste in music.they were asked how they like three types of music: rock, country western and jazz.the results are summarized below: no one dislikes all three types of music.six like all three types of music.eleven don’t like country western.sixteen like jazz.three like country western and jazz, but not rock.six don’t like rock.eight like rock and country western.seven don’t like jazz.how many students were surveyed?