An element with a mass of 540 grams decays by 17.9% per minute. To the nearest minute, how long will it be until there are 90 grams of the element remaining?

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

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734

m=-16

step-by-step explanation: