4. seven colored balls (red, blue, yellow, black, brown, white, and orange) are in a bag. a sample of three balls is
selected without replacement. how many different samples are possible?

Explain why the factor 1.5 is broke. into two numbers in the model.

Is the power produced directly proportional to the wind speed, give reasons for your answer?

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