Question

At 9:00 pm, Dominick turns on his nightlight. His nightlight uses 8 watts every hour. At 6:15 am, how many watts will the nightlight have used?

a) 78 watts
b) 96 watts
c) 106 watts
d) 112 watts

Answer 1

Dominick's nightlight would have used 74 watts of power from 9:00 pm to 6:15 am, which is calculated by multiplying 9.25 hours by 8 watts/hour. There seems to be a discrepancy as this answer is not among the provided options.

Step-by-step explanation:

To find out how many watts Dominick's nightlight has used by 6:15 am, we need to calculate the total time it was on and multiply that by the power usage per hour. From 9:00 pm to 6:15 am is a span of 9 hours and 15 minutes, or 9.25 hours. Since the nightlight uses 8 watts every hour, we simply multiply the total hours by the power usage:

9.25 hours × 8 watts/hour = 74 watts

However, this number does not match any of the options provided, suggesting that there may have been a typographical error in the question or answer choices. If this is a straight calculation based on the data provided, then the precise answer using the given data would be 74 watts, which is not listed among options a, b, c, or d.