The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs The distribution of the number of daily requests is bell - shaped and has a mean of 51 and a standard deviation of 9. Using the empirical rule , what is the approximate percentage of lightbulb replacement requests numbering between 51 and 78 ? Do not enter the percent symbol . Please help i have test

If g(x) = x+1/ x-2 and h (x) =4 - x , what is the value of ( g*h) (-3)?

What is the standard form of -5x^2+2x^4-11+x^3+3x

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