N(x*y)=24 n(x*z)=15 and n(y*z)=40. find n(x*y*z)

(x*y)*(x*z)*(y*z)=24*15*40

(x*y*z)^2=14400

xyz=-120 or xyz=120

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