Select all the solutions for the quadratic equation x2=81 . answer choices x=9 x=81 x=−9 x=−81

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)

Based on the random survey, what percent said they will vote for candidate a? round to the nearest whole percent. a) 49% b) 53% c) 58% d) 63%