Answer:
Prediction is not correct.
Step-by-step explanation:
We are given the following in the question:
Percentage of emails that come back undelivered = 3%
Total number of emails = 12,372
Number of undelivered notice = 437
Verification:
![3\%\times 12372\\\\=\dfrac{3}{100}\times 12372\\\\=371.16\\\neq 437](https://tex.z-dn.net/?f=3%5C%25%5Ctimes%2012372%5C%5C%5C%5C%3D%5Cdfrac%7B3%7D%7B100%7D%5Ctimes%2012372%5C%5C%5C%5C%3D371.16%5C%5C%5Cneq%20437)
He will receive approximately 371 undelivered email.
Thus, the prediction that editor will receive 437 notices for undelivered email is not correct.
<u>Part a)</u> if a page is reduced to 80%, what percent enlargement is needed to return it to its original size?
Let
x---------> the percent enlargement
we know that
the original size is the 100%
so
x*80%=100%
x=(100%/80%)
x=1.25--------> 1.25=(125/100)=125%
therefore
<u>the answer Part a) is</u>
the percent enlargement is 125%
<u>Part b)</u> Estimate the number of times in succession that a page must be copied to make the final copy less than 15% of the size of the original
we know that
A photocopy machine can reduce copies to 80% of their original size
so
Copy N 1
0.80*100%=80%
Copy N 2
0.80*80%=64%
Copy N 3
0.80*64%=51.2%
Copy N 4
0.80*51.2%=40.96%
Copy N 5
0.80*40.96%=32.77%
Copy N 6
0.80*32.77%=26.21%
Copy N 7
0.80*26.21%=20.97%
Copy N 8
0.80*20.97%=16.78%
Copy N 9
0.80*16.78%=13.42%-------------> 13.42% < 15%
therefore
<u>the answer Part b) is</u>
the number of times in succession is 9
1.25 × 96 = 120
OR
.25 × 96 = 24
24 + 96 =120
either way, same answer
N = (6*0.2)/0.06 = 20
The number is 20
Answer:
5.6
Step-by-step explanation:
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