Subtract 4.66×10^−5−7.34×10^−7 (1 point)
−2.68×10^2
−4.5866×10^−5
4.5866×10^−5
2.68×10^2
9 answers
4.5866×10^−5
The U.S. national debt was $2.9617×10^13 in 2021 and $3.98×10^11 in 1971. Find how much the debt increased in the 50-year period. (1 point)
$3.0015×10^13
$1.0183×10^24
$2.9219×10^11
$2.9219×10^13
$3.0015×10^13
$1.0183×10^24
$2.9219×10^11
$2.9219×10^13
To find how much the debt increased in the 50-year period, we need to subtract the debt in 1971 from the debt in 2021.
$2.9617×10^13 - $3.98×10^11 = $2.9219×10^13
Therefore, the debt increased by $2.9219×10^13.
$2.9617×10^13 - $3.98×10^11 = $2.9219×10^13
Therefore, the debt increased by $2.9219×10^13.
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)
2.72×10^−10 m
3.2×10^−11 m
3.2 ×10^−10 m
3.2×10^−9 m
2.72×10^−10 m
3.2×10^−11 m
3.2 ×10^−10 m
3.2×10^−9 m
To find the difference between the sizes of these atoms, we need to subtract the size of the hydrogen atom from the size of the oxygen atom.
0.000000000152 m - 1.2×10^−10 m = 1.52×10^-10 m - 1.2×10^-10 m = 0.32×10^-10 m = 3.2×10^-11 m
Therefore, the difference between the sizes of these atoms in scientific notation is 3.2×10^-11 m.
Correct answer: 3.2×10^-11 m
0.000000000152 m - 1.2×10^−10 m = 1.52×10^-10 m - 1.2×10^-10 m = 0.32×10^-10 m = 3.2×10^-11 m
Therefore, the difference between the sizes of these atoms in scientific notation is 3.2×10^-11 m.
Correct answer: 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)
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 9.83×10^−6 m.
A platelet has a bigger diameter than a red blood cell by 9.83×10^−6 m.
A platelet has a bigger diameter than a red blood cell by 5.17×10^−6 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 9.83×10^−6 m.
A platelet has a bigger diameter than a red blood cell by 9.83×10^−6 m.
A platelet has a bigger diameter than a red blood cell by 5.17×10^−6 m.
To determine which blood component has a bigger diameter, we need to compare the diameters of the platelet and red blood cell.
Diameter of platelet: 2.33×10^-6 m
Diameter of red blood cell: 0.0000075 m
To find the difference, 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
Therefore, a red blood cell has a bigger diameter than a platelet by 5.17×10^-6 m.
Correct answer: A red blood cell has a bigger diameter than a platelet by 5.17×10^-6 m.
Diameter of platelet: 2.33×10^-6 m
Diameter of red blood cell: 0.0000075 m
To find the difference, 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
Therefore, a red blood cell has a bigger diameter than a platelet by 5.17×10^-6 m.
Correct answer: 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 1.45×10^9 , while India’s population is approximately 1,400,000,000. How many more people live in China than in India?(1 point)
5×10^9
5×10^7
5×10^10
5×10^8
5×10^9
5×10^7
5×10^10
5×10^8
To find out how many more people live in China than in India, we need to subtract the population of India from the population of China.
Population of China: 1.45×10^9
Population of India: 1,400,000,000
Converting the population of India to scientific notation:
1,400,000,000 = 1.4×10^9
Now, let's subtract the population of India from the population of China:
1.45×10^9 - 1.4×10^9 = 0.05×10^9
Therefore, there are 0.05×10^9 or 5×10^8 more people living in China than in India.
Correct answer: 5×10^8
Population of China: 1.45×10^9
Population of India: 1,400,000,000
Converting the population of India to scientific notation:
1,400,000,000 = 1.4×10^9
Now, let's subtract the population of India from the population of China:
1.45×10^9 - 1.4×10^9 = 0.05×10^9
Therefore, there are 0.05×10^9 or 5×10^8 more people living in China than in India.
Correct answer: 5×10^8
1 answer