Subtract
4.66 times 10^-5 - 7.34 times 10^-7
4.66 times 10^-5 - 7.34 times 10^-7 = 4.66E-5 - 7.34E-7 = 0.0000466 - 0.000000734 = 0.000045866
4.66 Xx 10^-5 - 7.34 x 10^-7
-4.5866 x 10^-5
2.68 x 10^2
4.5866 x 10^-5
-2.68 x 10^2
4.66 times 10^-5 - 7.34 times 10^-7 = 4.66E-5 - 7.34E-7 = 0.0000466 - 0.000000734 = 0.000045866
The correct answer is 4.5866 x 10^-5.
The U.S. national debt was $2.9617×1013
in 2021 and $3.98×1011
in 1971. Find how much the debt increased in the 50-year period. (1 point)
Responses
$3.0015×1013
3.0015 dollars times 10 superscript 13 baseline
$1.0183×1024
1.0183 dollars times 10 superscript 24 baseline
$2.9219×1011
2.9219 dollars times 10 superscript 11 baseline
$2.9219×1013
To find the increase in the U.S. national debt over the 50-year period, we subtract the debt in 1971 from the debt in 2021.
$2.9617×10^13 - $3.98×10^11 = $29.617×10^11 - $0.398×10^12 = $29.219×10^11
The correct answer is $2.9219×10^11.
The size of a hydrogen atom is about 1.2×10−10
m across. The size of an oxygen atom is 0.000000000152 m across. What is the difference between the sizes of these atoms in scientific notation?(1 point)
Responses
2.72×10−10
m
2.72 times 10 superscript negative 10 baseline m
3.2×10−11
m
3.2 times 10 superscript negative 11 baseline m
3.2 ×10−10
m
3.2 times 10 superscript negative 10 baseline m
3.2×10−9
m
To find the difference between the sizes of these atoms, we subtract the size of the oxygen atom from the size of the hydrogen atom.
1.2×10^(-10) m - 0.000000000152 m = 1.2×10^(-10) m - 1.52×10^(-10) m = -0.32×10^(-10) m
The correct answer is 3.2×10^(-11) m.
Platelets and red blood cells are components of the blood. A typical platelet and red blood cell have diameters of approximately 2.33×10−6
m and 0.0000075 m, respectively. Which blood component has a bigger diameter, and approximately by how much?(1 point)
Responses
A platelet has a bigger diameter than a red blood cell by 5.17×10−6
m.
A platelet has a bigger diameter than a red blood cell by 5.17 times 10 superscript negative 6 baseline m.
A red blood cell has a bigger diameter than a platelet by 5.17×10−6
m.
A red blood cell has a bigger diameter than a platelet by 5.17 times 10 superscript negative 6 baseline m.
A red blood cell has a bigger diameter than a platelet by 9.83×10−6
m.
A red blood cell has a bigger diameter than a platelet by 9.83 times 10 superscript negative 6 baseline m.
A platelet has a bigger diameter than a red blood cell by 9.83×10−6
m.
To determine which blood component has a bigger diameter, we compare the diameters of the platelet and the red blood cell.
Platelet diameter: 2.33×10^(-6) m
Red blood cell diameter: 0.0000075 m
Comparing the two diameters, we see that the red blood cell has a bigger diameter than the platelet.
To find the difference in diameter, we subtract the diameter of the platelet from the diameter of the red blood cell:
0.0000075 m - 2.33×10^(-6) m = 0.0000075 m - 0.00000233 m = 0.00000517 m
The correct answer is: A red blood cell has a bigger diameter than a platelet by 5.17×10^(-6) m.
China and India are the most populous countries in the world. China’s population is approximately 1.45×109
, while India’s population is approximately 1,400,000,000. How many more people live in China than in India?(1 point)
Responses
5×107
5 times 10 superscript 7 baseline
5×108
5 times 10 superscript 8 baseline
5×109
5 times 10 superscript 9 baseline
5×1010