I need help with these problems because the teacher I have doesn’t really teach in class and puts videos up on the board and I don’t really understand and I have an assignment due tomorrow

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%