Astring quartet finds that when they play for donations they earn between $25 and $40 per hour. if they play for 3 hours and divide the money equally between the four members of the quartet, how much can each member expect to make?
a. less than $18
b. more than $42
c.$30 to $42
d.$18 to $30

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

How do i do this? i don’t understand

Aline passes through 3,7 and 6,9 what equation represents the line