James wants to pour a patio that is 18 feet by 20 feet. he wants the concrete to be 6 inches deep. how many cubic feet of concrete mix are needed for the patio? [1 ft = 12 inches] a) 45 cubic feet b) 90 cubic feet c) 180 cubic feet d) 240 cubic feet

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.