99.865 -: 1.29=

Question

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).