3 years ago

Weightbof 72 books is 9 kg. what is thebweight of 80 such books?How many such books would weigh 6 kg?

1 answer:

5 0

First, you would divide 9/72 by 72/72 and would get .125. So every book weighs .125 kg.

Then, to find how much 80 book weigh, you multiply 80 times .125 and get 10.

Lastly, to find how many books weigh 6 kg you, keep multiplying .125 by a number until you reach 6 kg. In this case the number is 48. So 48 books weigh 6 kg.

Hope this helped! ;D

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The radius of a sphere is 6 units.

skad [1K]

Answer: Four-thirdsπ(6)³

Step-by-step explanation: The formula for the volume of a sphere is attached in the image down below.

Notice that two of the options listed have three-fourths but we use four-thirds to find the volume of a sphere. This means that we can eliminate the 1st and the 3rd option.

Now, we will multiply that by π and then by the radius cubed which is also written as 6³. This means that our answer would be the second option.