Kendra finds the dimensions of a sticky note. She uses a meter stick to determine that the dimensions are 1.25×10−8 meters wide by 2.5×10−6 meters long. Use scientific notation to write the dimensions in millimeters.
Note: 1 meter is equal to 1,000 millimeters.
(1 point)
Responses
1.25×10−6 by 2.5×10−4 millimeters
1.25 times 10 superscript negative 6 baseline by 2.5 times 10 superscript negative 4 baseline millimeters
1.25×10−11 by 2.5×10−9 millimeters
1.25 times 10 superscript negative 11 baseline by 2.5 times 10 superscript negative 9 baseline millimeters
1.25×10−10 by 2.5×10−8 millimeters
1.25 times 10 superscript negative 10 baseline by 2.5 times 10 superscript negative 8 baseline millimeters
1.25×10−5 by 2.5×10−3 millimeters
1.25 times 10 superscript negative 5 baseline by 2.5 times 10 negative cubed millimeters
The number 3.28E12 represents 3.28 multiplied by 10^12 in scientific notation.
So, the correct answer is:
3.28×10^12
(3.28 times 10 superscript 12 baseline)
The number 2.81E4 represents 2.81 multiplied by 10^4 in scientific notation.
So, the correct answer is:
2.81×10^4
(2.81 times 10 superscript 4 baseline)
The correct answer is:
1.25×10−5 by 2.5×10−3 millimeters
(1.25 times 10 superscript negative 5 baseline) by (2.5 times 10 superscript negative 3 baseline) 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
3.99×104 seconds
3.99 times 10 superscript 4 baseline seconds
3.99×105 seconds
3.99 times 10 superscript 5 baseline seconds
3.99×103 seconds
3.99 times 10 cubed seconds
0.399×106 seconds
0.399 times 10 superscript 6 baseline seconds
To find the total number of seconds, we multiply the number of songs by the average time of each song.
1900 songs * 3.5 minutes = 6650 minutes
To convert minutes to seconds, we multiply by 60:
6650 minutes * 60 seconds = 399000 seconds
Therefore, the total number of seconds the playlist will play is 3.99×10^5 seconds.
The correct answer is:
3.99×10^5 seconds
(3.99 times 10 superscript 5 baseline) seconds
The number of molecules in 100 moles is given as 6.02E25. In scientific notation, this is written as:
6.02×10^25
The correct answer is:
6.02×10^25
(6.02 times 10 superscript 25 baseline)
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 times 10 superscript negative 12 baseline
3.28×1012
3.28 times 10 superscript 12 baseline
3.28+1012
3.28 plus 10 superscript 12 baseline
12×103.28
12 times 10 superscript 3.28 baseline
Sam is comparing the half-life of two isotopes of uranium. The half-life of Uranium-238 is 4.5×109 years. The half-life of Uranium-233 is 1.6×105 years. He computed how much greater the half-life of Uranium-238 is than that of Uranium-233, and his calculator displayed the number 2.81E4. What is this number in scientific notation?(1 point)
Responses
2.81+104
2.81 plus 10 superscript 4 baseline
4×102.81
4 times 10 superscript 2.81 baseline
2.81×10−4
2.81 times 10 superscript negative 4 baseline
2.81×104
2.81 times 10 superscript 4 baseline
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 times 25
25×106.02
25 times 10 superscript 6.02 baseline
6.02+1025
6.02 plus 10 superscript 25 baseline
6.02×1025
6.02 times 10 superscript 25 baseline