The graph shown represents the volume of petroleum
in a spherical tank with a 15-foot radius as a function of
the height of the liquid, in feet. This relationship can be
modeled by the equation y = 15.7x2 - 7x2. What is
the approximate height of the petroleum in the tank
when the volume is 5,300 ft??
0 12.25 ft
O 12.5 ft
O 12.75 ft
O 13.25 ft