Which of these values represents the longest period of time?

A. 300 minutes

B. 30 hours

C. 0.3 days

D. 30,000 milliseconds

300 minutes is only 5hrs

0.3 days is only 7.2 hrs

30,000 milliseconds isn't even 1hr

B. 30 hours is correct

30 hours

Step-by-step explanation:

We need to convert these to the same period of time

A. 300 minutes

B. 30 hours

30 hours * 60 minutes / 1 hour = 1800 minutes

C. 0.3 days

.3 days * 24 hours / 1 day * 60 minutes / 1 hours = 432 minutes

D. 30,000 milliseconds

30 000 ms * 1 seconds / 1000 ms * 1 minute/60 seconds =.5 minutes

1800 minutes is the longest