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= 0.321t^2 - 1.036t+0.698
e= 0.099t^2 - 0.120t+ 0.295

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

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step-by-step explanation:

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step-by-step explanation:

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