Use Descartes's rule of signs to determine the possible number of:
a) positive real roots of
b) negative real roots of
c) positive real roots of
d0 negative real roots of

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?