Question

Kyra and Pari are timing how long it takes for 1 g of sugar to dissolve in hot water. Kyra records a time of 24.3 seconds. Pari records a time of 24 seconds. Whose reading is more precise? Explain Why?

Answer 1

We can say that Kyra's reading is more precise.

• A reading with more number of significant figures is considered to be more precise.
• Kyra recorded a reading of 24.3 seconds. Since all non-zero digits are considered to be significant, this reading has 3 significant figures.
• Pari recorded a reading of 24 seconds. Since, all non-zero digits are considered to be significant, this reading has 2 significant figures.
• Hence, we can say that Kyra's reading has more significant figures and so it is more precise.

Answer 2

Answer:

We can say that Kyra's reading is more precise.

A reading with more number of significant figures is considered to be more precise.

Kyra recorded a reading of 24.3 seconds. Since all non-zero digits are considered to be significant, this reading has 3 significant figures.

Pari recorded a reading of 24 seconds. Since, all non-zero digits are considered to be significant, this reading has 2 significant figures.

Hence, we can say that Kyra's reading has more significant figures and so it is more precis

Explanation: