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3 years ago

9

at the library, you find 9 books on a certain topic. the librarian tells you that 55% of the books on this topic have been signe

d out. how many books does the library have a available on the topic?

1 answer:

e-lub [12.9K]3 years ago

8 0

Multiply 9 books by 55% by doing

9 x .55 = 4.95

We can't have 4.95 books, though so it rounds down to 4 because you can't just add another .05.

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hichkok12 [17]

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They give you the width, but let's convert it to an improper fraction first:
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The length is twice the width so it is:
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Now, we are ready to solve, plug in values in the perimeter formula:
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3 years ago