PLEASE HELP IM BEGGING Question: A How does Decartes' Rule of Signs help you to know your solutions are correct? Why is the complex solution column always an even number?
B. Show how you would use Descartes' Rule for the type and number of solutions of the following polynomial: x^3 - 5x^2 +16x-80

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)