Pls help tomorrow is literally the last day of online school

Which of the following three dimensional figures has a circle as it’s base

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents