4/9 kilogram of baking soda costs $2. How much does 1 kilogram of baking soda cost? please drop an explanation, and equation thanks!

1 kg of baking soda costs $4.50.

Step-by-step explanation:

Write and solve an equation of ratios, as follows:

 4/9 kg            $2

=

    1 kg               x

Multiplying both numerators by 9, we get:

  4 kg          $18

=

   1 kg             x

Cross-multiplying, we get 4x kg = $18-kg.  Solving for x, we get:

        $18-kg

x = = $4.50

         4kg

1 kg of baking soda costs $4.50.

B. 50%

Step-by-step explanation:

it's half and half