say a student records every students height in a certain grade, what probability sample would that be

If lmn=xyz, which congruences are true by cpctc? check all that apply

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

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²