Multiply (4.7 x 104) by (6.4 x 1015). express your answer in scientific notation.

a) 3.008 x 10^20
b) 3.008 x 10^60
c) 3.008 x 10^61
d) 30.08 x 10^19

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