Find the linear approximation of the function f(x, y, z) = x2 + y2 + z2 at (2, 9, 6) and use it to approximate the number 2.032 + 8.982 + 5.992 . (round your answer to five decimal places.)

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?