Question 4, chap 1, sect 4 part I of1 10 points A fisherman catches two sturgeon

Question

Question 4, chap 1, sect 4 part I of1 10 points A fisherman catches two sturgeons. The smaller of the two has a mensured length of 90.75 em cant figures), and the larger fish has a mea- sured length of 139.7 cm (one decimal place and four significant figures). (two decimal places and four signif- What rule must be used on the sum to find the total length of the two fish? 1. Whole number (230 cm) 2. Tenths (230.4 cm) 3. None of these 4. Five significant figures (230.45 cm) 5. Hundredths (230.45 cm) 6. Two significant figures (230 cm) 7. Three significant figures (230 cm) 8. Four significant figures (230.4 cm) 9. Hundreds (230 cm)

Explanation / Answer

In addition or subtraction, the final result should retain as many decimal places as are there in the number with the least decimal places. After mere arithmetic addition, we get 230.45. According to to the rule it has to be 230.4 but the insignificant digit is 5 and the preceding digit is even(4), so we simply drop 5 and we get 230.4.
It has to be 230.4 cm.

So

2. Tenths (230.4 cm) should be followed.

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