From 1991 through 1998, the number of
commercial C and education E Internet websites
can be modeled by the following equations, where
t is the number of years since 1991.
C = 0.321t2 - 1.036t +0.698
E = 0.099t2 - 0.120t + 0.295

What's a recharge area? a. the part of an aquifer where groundwater meets a lake or stream b. the part of an aquifer where surface water reaches the water table c. the part of an aquifer that's located between two aquicludes d. the part of an aquifer that's located at a lower elevation