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ale4655 [162]
3 years ago
6

Anson estimated he would need 17 hours to complete his science project. He actually needed 19 1 2 19 1 2 hours. What was his per

cent error? A. 12.8% B. 14.7% C. 87.2% D. 115%
Mathematics
2 answers:
satela [25.4K]3 years ago
7 0

Answer:

The answer is B. 14.7%.

Step-by-step explanation:

Given:

Estimated time need to complete project 17h.

Actually time needed 19\frac{1}{2}h=\frac{39}{2}h.

Difference between the time ET-AT= \frac{39}{2}- 17\\=\frac{39}{2} -\frac{34}{2}\\ =\frac{5}{2}=2.5h.

So, the percentage error is \frac{2.5}{17}\times100\\ =\frac{250}{17} \\=14.70%.

Therefore, the answer is B. 14.7%.

 

yanalaym [24]3 years ago
7 0

<u>Answer: </u>

Option (A)

Anson percent error is 12.8%

<u>Explanation:</u>

Given the approximate value of completion = 17 hours

Exact value of completion = 19.5 hours

Absolute Error = Exact – Approximation  

Absolute Error = 19.5 – 17 = 2.5

% Error =\frac{\text { Absolute Error }}{\text { Exact Value }} \times 100

% Error =\frac{2.5}{19.5} \times 100=12.8 \%

Therefore, the percent error is 12.8%

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