In a survey of 251 professional athletes, it was found that 121 of them owned a convertible, 101 of them owned a giant screen TV, and 124 owned a sporting goods store. 29 owned a convertible and a store, 33 owned a TV and a store, and 59 owned a covertible and a TV. 9 owned all three items. Q: How many athletes owned a convertible or TV?

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To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?