Which of the following is the closest to the standard deviation of the data set {-3,-2,-1,0,1,2,3}?

(A) -3 (B) -1 (C) 0 (D) 2 (E) 6

Write one or two sentences to explain why each choice works or not.

Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?