Can somebody help me

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

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each