Read the question on the screenshot.

Will mark brainliest question in the pic.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.