Duas torneiras com um caudal, cada uma de 10 litros/min, enchem um depósito em 15 horas.
a) quantos metros cúbicos de água leva o depósito ?
b) com 5 torneiras de igual caudal quantas horas levaria a encher o deposito?

Find the power series expantion of f(z)=log(4=3z) at the point z=-1

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

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