Final answer:
To compute for the percent error, subtract the experimental measurement from the accepted measurement, divide it by the accepted measurement, and multiply it by 100%. The percent error in this case is 13.5%.
Step-by-step explanation:
To compute for the percent error, we need to calculate the difference between the experimental measurement and the accepted measurement, divide it by the accepted measurement, and multiply it by 100%.
Percent error = |Experimental measurement - Accepted measurement| / Accepted measurement * 100%
Percent error = |34.6 cm - 40 cm| / 40 cm * 100%
Percent error = 5.4 cm / 40 cm * 100%
Percent error = 0.135 * 100%
Percent error = 13.5%
Therefore, the correct answer is option b) 13.5%.