
To convert from meters to millimeters, we can multiply the measurement by 1,000 since there are 1,000 millimeters in a meter.
For the width, 1.25×10^−8 meters, we multiply by 1,000 to convert to millimeters:
1.25×10^−8 × 1,000 = 1.25×10^−5 millimeters
For the length, 2.5×10^−6 meters, we multiply by 1,000 to convert to millimeters:
2.5×10^−6 × 1,000 = 2.5×10^−3 millimeters
Therefore, the dimensions in millimeters are 1.25×10^−5 by 2.5×10^−3 millimeters.

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.(1 point)
Responses
3.99×10^4 seconds
0.399×10^6 seconds
3.99×10^3 seconds
3.99×10^5 seconds

To find the total number of seconds the playlist will play, we need to multiply the number of songs (1,900) by the average time per song (3.5 minutes) and convert it to seconds.
1 minute = 60 seconds
So, the total number of seconds can be calculated as follows:
1,900 songs × 3.5 minutes/song × 60 seconds/minute
= 1,900 × 3.5 × 60 seconds
= 399,000 seconds
Therefore, the total number of seconds the playlist will play is 3.99×10^5 seconds.


In chemistry class, Carlos calculated the number of molecules in 100 moles. The calculator displayed the number 6.02E25. What is the number of molecules in 100 moles in scientific notation?(1 point)
Responses
6.02×25
6.02×10^25
6.02+10^25
25×10^6.02

The number of molecules in 100 moles is 6.02E25.
6.02E25 represents 6.02 multiplied by 10 to the power of 25.
Therefore, the number of molecules in 100 moles in scientific notation is 6.02×10^25.

In government class, Nadia computed 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 this number in scientific notation?(1 point)
Responses
3.28+10^12
3.28×10^12
3.28×10^−12
12×10^3.28


The number 3.28E12 represents 3.28 multiplied by 10 to the power of 12.
Therefore, this number in scientific notation is 3.28×10^12.

Sam is comparing the halflife of two isotopes of uranium. The halflife of Uranium238 is 4.5×10^9 years. The halflife of Uranium233 is 1.6×10^5 years. He computed how much greater the halflife of Uranium238 is than that of Uranium233, and his calculator displayed the number 2.81E4. What is this number in scientific notation?(1 point)
Responses
4×10^2.81
2.81+10^4
2.81×10^−4
2.81×10^4

The number 2.81E4 represents 2.81 multiplied by 10 to the power of 4.
Therefore, this number in scientific notation is 2.81×10^4.


4 is wrong but everything else is great

4 is right its 3.28x10^12