PLEASE HELP ME Poison ivy is a weed that produces an oil which causes skin rashes. Scientists want to perform an experiment to see if poison ivy grows taller when exposed to more carbon dioxide. How should the control group in this experiment be treated? Choose 1 Choose 1 (Choice A) A The control group should have plants growing at normal carbon dioxide level. (Choice B) B The control group should have plants growing at different carbon dioxide levels. (Choice C) C The control group should have plants growing at higher oxygen levels. (Choice D) D The control group should have plants growing in different amounts of water.

B. The control group should have plants growing at different carbon dioxide levels

Step-by-step explanation:

If it is being tested in different carbon dioxide levels, the control group would have enough data to determine which carbon dioxide level(s) is more effective.

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