The brain volumes ​(cm3​) of 50 brains vary from a low of 926 cm3 to a high of 1476 cm3. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 169 cm3​, assuming the estimate is accurate if it is within 15 cm3. The estimated standard deviation is nothing cm3. ​(Type an integer or a decimal. Do not​ round.)

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Ineed with math stuff it involves graphs