Find the linear approximation of the function below at the indicated point. f(x, y) = √√√41 - x² - 4y² at (4,2) f(x, y) = Use this approximation to find f(3.93, 1.94). (Round your answer to three decimal places.) f(3.93, 1.94)

A Skydiver When a skydiver jumps from an airplane, his downward velocity, in feet per second, before he opens his parachute, is given by v=1761-0.834t, where t is the number of seconds that have elapsed since he jumped from the airplane. What is the velocity after 5 seconds?

Find the equation of the line perpendicular to the line g(x)=0.01x+2.01 through the point (1,2).

A forest fire leaves behind an area of grass burned in an expanding circular pattern. If the radius of the circle of burning grass is increasing with time according to the formula r(t)=2t+1 , express the area burned as a function of time, t (minutes).