The base of a triangular pyramid has an area of 20 square feet. The height of the pyramid is 36 feet. The volume of the pyramid is 720 cubic feet

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

Do you need with the x value for the minimum? its always between the two intercepts for a parabola