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Answer:
The mass of half a liter of water is 500g, that is, 0.5kg.
Step-by-step explanation:
Density is mass divided by the volume, that is:

Here, we have to be careful. Since the density is in grams per cm³, m has to be in grams and v in cm³.
We have that:

What is the mass of half a liter of water?
One liter is 1000 cm³.
So half a liter is 1000/2 = 500 cm³, which means that 
Then



The mass of half a liter of water is 500g, that is, 0.5kg.
Answer:
The correct option is D.
Step-by-step explanation:
We have to find the expresses this statement: A quantity x is equal to the sum of the squares of a and b.
The square of a can be written as a² and the square of b can be written as b².
The sum of squares of a and b can be written as

Since the quantity x is equal to the sum of the squares of a and b, therefore

Therefore option D is correct.
Answer:
The product of something is what you get after you multiply two numbers together
Step-by-step explanation: