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Calculate the difference:

\[ 101 \, \text{cm} - 99.1 \, \text{cm} = 1.9 \, \text{cm} \]

Answer :

For 101 cm - 99.1 cm, round the answer to the tenths place, resulting in 1 significant figure. For 0.5 atm + 9.8 atm, round the answer to the tenths place, resulting in 3 significant figures.

(a) 101 cm − 99.1 cm = 1.9 cm (unrounded)

In subtraction, the number of decimal places in the answer should match the number with the fewest decimal places in the original numbers. Here, 99.1 cm has one decimal place, so after rounding, the answer should be reported to the tenths place and thus has 1 significant figure.

(b) 0.5 atm + 9.8 atm = 10.3 atm (unrounded)

In addition, the number of decimal places in the answer should match the number with the fewest decimal places in the original numbers. Both 0.5 atm and 9.8 atm have one decimal place, so after rounding, the number should be reported to the tenths place and thus has 3 significant figures.

Complete question:-

To what decimal place should each answer be rounded? How many significant figures does the rounded answer have?

(a) 101 cm−99.1 cm=1.9 cm (unrounded) After rounding, the answer should be reported to the ( ones place / tenths place / hundredths place ) and thus has (1 significant figure / 2 significant figure / 3 significant figure ) (b) 0.5 atm + 9.8 atm = 10.3 atm (unrounded) After rounding, the number should be reported to the ( ones place / tenths place / hundredths place ) and thus has (1 significant figure / 2 significant figure / 3 significant figure ).

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Rewritten by : Barada

That is correct...
101 cm - 99.1 cm does equal 1.9 cm