NEED HELP NOW For an experiment, a scientist needs 12 cup baking soda for 45 liter of water. Using this ratio, how much baking soda is needed for one liter of water? ansewr choices:
A:4/10 cup

B:5/8 cup

C:8/5 cups

D:10/4 cups

4/15 cups

Step-by-step explanation:

If a cups scientist needs 12 cup baking soda for 45 liter of water, this can be expressed as;

12 cup of soda = 45 litres of water

To get the amount of soda needed for one litre, we will say;

x soda = 1 litre

Divide both equations;

12/x = 45/1

Cross multiply'45x = 12

x = 12/45

x = 4/15

Hence the required answer us 4/15 cups

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step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: