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.
To find how much the debt increased in the 50-year period, we subtract the debt in 1971 from the debt in 2021.
$2.9617×10^13 - $3.98×10^11 = $2.9217×10^13.
Therefore, the debt increased by approximately $2.9217×10^13 in the 50-year period.
To find the difference between the sizes of these atoms in scientific notation, 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
Since the second term is already in scientific notation, let's convert the first term to scientific notation by moving the decimal point to the right until we have a number between 1 and 10:
0.000000000152 m = 1.52×10^(-10) m
Now we can subtract the numbers:
1.52×10^(-10) m - 1.2×10^(-10) m = 0.32×10^(-10) m
To convert the result to scientific notation, we can write it as:
0.32×10^(-10) m = 3.2×10^(-11) m
Therefore, the difference between the sizes of the hydrogen and oxygen atoms is 3.2×10^(-11) m.
Subtract 4.66×10−5−7.34×10−7(
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?
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?
To determine which blood component has a bigger diameter and by how much, we can directly compare the diameters of the platelet and red blood cell.
Given:
Platelet diameter: 2.33×10^(-6) m
Red blood cell diameter: 0.0000075 m
To compare the diameters, we need to put them in the same unit. We can convert the platelet diameter to meters:
2.33×10^(-6) m = 0.00000233 m
Now we can compare the diameters:
Platelet diameter: 0.00000233 m
Red blood cell diameter: 0.0000075 m
Comparing these numbers, we can see that the red blood cell has a bigger diameter than the platelet. The difference in diameter is:
0.0000075 m - 0.00000233 m = 0.00000517 m
Therefore, the red blood cell has a bigger diameter than the platelet by approximately 0.00000517 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?
To determine how many more people live in China than in India, we need to subtract the population of India from the population of China.
China's population: 1.45×10^9
India's population: 1,400,000,000
To make the numbers consistent, let's convert the population of China to the same format as India's population:
1.45×10^9 = 1,450,000,000
Now we can subtract the population of India from the population of China:
1,450,000,000 - 1,400,000,000 = 50,000,000
Therefore, there are 50,000,000 more people living in China than in India.
To find the increase in the national debt over a 50-year period, we need to subtract the initial debt from the final debt. Here's how you can calculate it:
1. Start by subtracting the initial debt from the final debt: $2.9617×10^13 - $3.98×10^11
Let's first simplify the exponential notation. In scientific notation, we can multiply the numbers and add their exponents, provided they have the same base:
(2.9617 - 0.398) × 10^13
2. Subtract the numbers within the parentheses:
2.5637 × 10^13
So, the increase in the U.S. national debt over the 50-year period is approximately $2.5637×10^13.
To subtract these numbers, we need to make sure they have the same exponent. In this case, both numbers have a negative exponent but different bases.
Therefore, we can rewrite them as:
4.66×10^(-5) - 7.34×10^(-7)
Now, we can subtract the numbers:
4.66×10^(-5) - 7.34×10^(-7) = 4.66×10^(-5) - 0.0000734
Finally, we can simplify the subtraction:
4.66×10^(-5) - 0.0000734 = 0.0000466 - 0.0000734 = -0.0000268
Therefore, the result of the subtraction is -0.0000268, or -2.68×10^(-5).