Find the derivative of the following functions
f(x) = x^7 - 2x^3 - 9x

Answer for 10 points show work you guys in advanced < 3

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Tobias gold sells computers at the office center he's guaranteed a minimum salary of $1,959 per month plus 6.3% commission on total sales how much in total sales is he