Jim’s music library on his phone holds 1,900 songs. The songs have an average time of 3.5 minutes. Use scientific notation to find the total number of seconds the playlist will play. Express the answer to the exact decimal place.
To find the total number of seconds the playlist will play, we need to multiply the number of songs by the average time of each song:
Total time in minutes = 1,900 songs × 3.5 minutes/song = 6,650 minutes
To convert minutes to seconds, we need to multiply by 60:
Total time in seconds = 6,650 minutes × 60 seconds/minute = 399,000 seconds
The total number of seconds the playlist will play is 399,000 seconds.
Expressed in scientific notation, this is 3.99 × 10^5 seconds.
The number of molecules in 100 moles, as calculated by Carlos, is 6.02E25.
In scientific notation, this can be written as 6.02 × 10^25.