Ricardo's family is on vacation. the first day they drove 348.9 miles. the second day they drove 527.2 miles. the third day they drove 221.7 miles. about how far did ricardo's family drive on their vacation?

Answer question above and explain each step : )

On a piece of paper graph f(x)=5•(0.4)^x

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