Which of the following represents dy/dx when y = e-2x sec (3x)? a. 3e -2x sec (3x) tan (3x) - 2xe-2x sec (3x) b. 3e -2x sec (3x) tan (3x) - 2e-2x sec (3x) c. 3e -2x sec (3x) tan (x) - 2xe-2x sec (3x)d. 3e -2x sec (3x) tan (x) - 2e-2x sec (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

How do i do this activity, is appreciated

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75