Question

99.865 -: 1.29=
A. calculator answer
B. correct significant digits

Answer 1

To calculate \( 99.865 \div 1.29 \):

1. Perform the calculation using a calculator:
\[
99.865 \div 1.29 \approx 77.5
\]

2. Determine the correct significant figures:
- The number \( 99.865 \) has 5 significant figures.
- The number \( 1.29 \) has 3 significant figures.
- The result should be reported with the minimum number of significant figures from the numbers used in the calculation, which is 3 in this case.

So the answer with the correct number of significant digits is:
\[
\approx 78.0
\]

Thus, the final answer is:
**B. 78.0** (with correct significant digits).