If f(x) = 22 +1, what is f(x) when x = 3?

Step-by-step explanation:

is f(x)=22+1, then it doesn't matter what value you choose for x, the function f(x) will always be 23.  

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