What’s the percent of $8.40 and $6.30

Perform the indicated operation. 8/a - 6/a + 7/a

Use the function nest to evaluate p(x) = 1 + x + · · · + x50 at x = 1.00001. (use the matlab ones command to save typing.) find the error of the computation by comparing with the equivalent expression q(x) = (x51 − 1)/(x − 1).

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