Question

question 1 of 20
a stopwatch measures time to the nearest 0.1 seconds. which is the most appropriate way to report time using this stopwatch?
a. 24.78 seconds
b. 24.778 seconds
c. 24.8 seconds
d. 25 seconds

Explanation:

Step1: Understand stop - watch precision

The stop - watch measures to the nearest 0.1 seconds. So the time should be reported with one decimal place.

Step2: Analyze each option

• Option A: 24.78 seconds has two decimal places, which is more precise than the stop - watch can measure.
• Option B: 24.778 seconds has three decimal places, which is more precise than the stop - watch can measure.
• Option C: 24.8 seconds has one decimal place, which is consistent with the precision of the stop - watch.
• Option D: 25 seconds has no decimal places, so it does not use the full precision of the stop - watch.

Answer:

C. 24.8 seconds