If one zero of the following polynomial 8x^2-13x-4k is the reciprocal of the other, then find k

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 150, 120, 136, 180, 158, 175, 124, 162 minimum maximum median upper quartile lower quartile

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25