30 gallons per hour to quarts per hour

Write a polynomial for a third-degree polynomial with leading coefficient -4

Is the power produced directly proportional to the wind speed, give reasons for your answer?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.