Rylan is testing 2 different types of nail polish on her fingernails to determine which one lasts longer. she purchases brand a and brand b from the drug store. she then paints her nails with brand a and her sister's nails with brand b. she compares the nails polish at the end of the week and determines that brand b last longer because there fewer chips than brand a. why is her conclusion not valid?

b

Step-by-step explanation:

She painted her sister's nails with Brand B, not her own nails.

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