Jim's music library on his phone holds $1,900 songs. The songs have an average time of 3.5 minutes. You scientific notation to find the total number of seconds to playlist will play Express the answer to the exact decimal place.

Question

A. 3.99 * 10 ^ 5 seconds
B. 3.99 * 10 ^ 4 seconds
C. 0.399 * 10 ^ 6 seconds
D. 3.99 * 10 ^ 3 seconds

Answer 1

To find the total number of seconds the playlist will play, we need to multiply the number of songs by the average time per song.

Number of songs = 1,900
Average time per song = 3.5 minutes = 3.5 * 60 seconds = 210 seconds

Total number of seconds = 1,900 * 210 = 399,000 seconds

399,000 can be written in scientific notation as 3.99 * 10^5 seconds.

Therefore, the answer is A. 3.99 * 10^5 seconds.

Answer 2

and government class Nadia computer the amount of debt of the Federal government after a third of it was paid in 1995. The calculator displayed the number 3.28E12. what is the number in scientific notation?
A. 12 * 10 to the 3.28 power

B. 3.28 + 10 to the 12th power
C. 3.28 * 10 to the 12th power
D. 3.28 * 10 to the negative 12th power

Answer 3

The number 3.28E12 is already in scientific notation. The "E" represents "times ten to the power of." In this case, E12 means the number should be multiplied by 10 to the power of 12.

Therefore, the number in scientific notation is C. 3.28 * 10 to the 12th power.