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Shtirlitz [24]
3 years ago
11

Serena had yards of tape. She used yards to attach a sign to the wall. How many yards of tape does Serena have left? Express you

r answer in simplest form. yards
Mathematics
1 answer:
professor190 [17]3 years ago
6 0
Serena had 7 4/9 yd of tape.
She used 2 1/9 yd.
How much tape does she have left?

        7 4/9
     -  2 1/9
--------------

Since both fractions have the same denominator, and since the lower fraction is smaller than the upper fraction, you can subtract the fractions by subtracting the numerators and using the same denominator. Then also subtract the whole numbers.

        7 4/9
     -  2 1/9
--------------
        5 3/9

The difference is 5 3/9.
3/9 can be reduced since both 3 and 9 are divisible by 3, so we divide both 3 and 9 by 3 to get 1/3.

Answer: 5 1/3 yards
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The diameter of cold virus cell is about 3x10-9 meter,and the diameter of a streptoccus bacterium cell is about 9x10-7 meter. Wh
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Here we need to compare the orders of magnitude of two measures.

We will see that the bacteria is<em> 300 times larger than the virus.</em>

We know that:

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The diameter of the bacteria cell is:

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So, to compare them, first notice that both are in the same units, meters, so we only need to <u>compare the numbers</u>.

Is common sense to identify the one with the largest exponent as the largest number, and the largest exponent is -7, thus <u>the bacteria should be the larger one.</u>

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So we can say that the bacteria is 3*10^2 = 3*100 = 300 times larger than the virus.

If you want to learn more, you can read:

brainly.com/question/4953281

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