The population of Matholandia can be modeled by the equation A=Pe^rt , where A is the population in millions and t is the number of years. In 1900, the census reported the population to be P=40, and since then it has increased at a rate of 2% each year. What will the population be in 2020?

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

hope this you