In order to subtract numbers written in scientific notation, the exponents must be the same.
We can rewrite the numbers as:
4.66×10^(-5) - 7.34×10^(-7)
To make the exponents match, we can rewrite 7.34×10^(-7) as:
0.0734×10^(-5)
Now we have:
4.66×10^(-5) - 0.0734×10^(-5)
To subtract these numbers, we just subtract the coefficients (the numbers before the multiplication sign) and keep the same exponent:
(4.66 - 0.0734) × 10^(-5)
4.5866 × 10^(-5)
Subtract 4.66×10^−5−7.34×10^−7 (1 point)
17 answers
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)
To find the increase in the national debt over 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
First, let's rewrite the numbers so that the exponents match:
$29.617×10^12 - $0.398×10^12
Now, we subtract the coefficients and keep the same exponent:
($29.617 - $0.398) × 10^12
$29.219 × 10^12
Therefore, the national debt increased by $29.219 × 10^12 in the 50-year period.
$2.9617×10^13 - $3.98×10^11
First, let's rewrite the numbers so that the exponents match:
$29.617×10^12 - $0.398×10^12
Now, we subtract the coefficients and keep the same exponent:
($29.617 - $0.398) × 10^12
$29.219 × 10^12
Therefore, the national debt increased by $29.219 × 10^12 in the 50-year period.
sorry but thats not an option
Apologies for the confusion. Let me recalculate the increase in the national debt over the 50-year period.
To find the increase, we subtract the debt in 1971 from the debt in 2021:
$2.9617×10^13 - $3.98×10^11
To subtract numbers in scientific notation, the exponents must be the same. Let's rewrite the numbers so that the exponents match:
$2.9617×10^13 - $0.398×10^13
Now, subtract the coefficients and keep the same exponent:
($2.9617 - $0.398) × 10^13
= $2.5637 × 10^13
Therefore, the national debt increased by $2.5637 × 10^13 over the 50-year period.
To find the increase, we subtract the debt in 1971 from the debt in 2021:
$2.9617×10^13 - $3.98×10^11
To subtract numbers in scientific notation, the exponents must be the same. Let's rewrite the numbers so that the exponents match:
$2.9617×10^13 - $0.398×10^13
Now, subtract the coefficients and keep the same exponent:
($2.9617 - $0.398) × 10^13
= $2.5637 × 10^13
Therefore, the national debt increased by $2.5637 × 10^13 over the 50-year period.
also not an option here ill put the options
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)
A) 2.9219 * 10^11
B) 3.0015 * 10^13
C) 2.9219 * 10^13
D) 1.0183 * 10^24
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)
A) 2.9219 * 10^11
B) 3.0015 * 10^13
C) 2.9219 * 10^13
D) 1.0183 * 10^24
Apologies for the mistakes in the previous responses.
To find the increase in the national debt over the 50-year period, we subtract the debt in 1971 from the debt in 2021:
Debt in 2021: $2.9617×10^13
Debt in 1971: $3.98×10^11
To subtract numbers in scientific notation, we need to rewrite them with matching exponents:
Debt in 2021: $29.617×10^12
Debt in 1971: $0.398×10^12
Now, we can subtract the coefficients and keep the exponent:
($29.617 - $0.398) × 10^12 = $29.219 × 10^12
So, the increase in the national debt over the 50-year period is $29.219 × 10^12.
Looking at the given options, the correct answer would be C) 2.9219 * 10^13.
To find the increase in the national debt over the 50-year period, we subtract the debt in 1971 from the debt in 2021:
Debt in 2021: $2.9617×10^13
Debt in 1971: $3.98×10^11
To subtract numbers in scientific notation, we need to rewrite them with matching exponents:
Debt in 2021: $29.617×10^12
Debt in 1971: $0.398×10^12
Now, we can subtract the coefficients and keep the exponent:
($29.617 - $0.398) × 10^12 = $29.219 × 10^12
So, the increase in the national debt over the 50-year period is $29.219 × 10^12.
Looking at the given options, the correct answer would be C) 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)
To find the difference between the sizes of the hydrogen and oxygen atoms, we subtract their sizes:
1.2×10^(-10) - 0.000000000152
In order to subtract these values, we need to rewrite them in the same units.
1.2×10^(-10) is already in scientific notation, so no further conversion is needed.
0.000000000152 can be rewritten in scientific notation as:
1.52×10^(-10)
Now we can subtract the values:
1.2×10^(-10) - 1.52×10^(-10)
To subtract these values, we subtract the coefficients and keep the same exponent:
(1.2 - 1.52) × 10^(-10)
Therefore, the difference between the sizes of the hydrogen and oxygen atoms is -0.32 × 10^(-10) in scientific notation.
1.2×10^(-10) - 0.000000000152
In order to subtract these values, we need to rewrite them in the same units.
1.2×10^(-10) is already in scientific notation, so no further conversion is needed.
0.000000000152 can be rewritten in scientific notation as:
1.52×10^(-10)
Now we can subtract the values:
1.2×10^(-10) - 1.52×10^(-10)
To subtract these values, we subtract the coefficients and keep the same exponent:
(1.2 - 1.52) × 10^(-10)
Therefore, the difference between the sizes of the hydrogen and oxygen atoms is -0.32 × 10^(-10) in scientific notation.
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)
A) 2.72 * 10^-10
B) 3.2 * 10^−10 m
C) 3.2 * 10^−11 m
D) 3.2 * 10^−9 m
A) 2.72 * 10^-10
B) 3.2 * 10^−10 m
C) 3.2 * 10^−11 m
D) 3.2 * 10^−9 m
To find the difference between the sizes of the hydrogen and oxygen atoms, we subtract their sizes:
1.2×10^(-10) m - 0.000000000152 m
The sizes are already in the same unit, so we can directly subtract the values:
1.2×10^(-10) - 0.000000000152
To perform the subtraction, we need to express both values in scientific notation:
1.2×10^(-10) - 1.52×10^(-10)
To subtract these values, we subtract the coefficients and keep the same exponent:
(1.2 - 1.52) × 10^(-10)
The result is -0.32 × 10^(-10) m.
From the given options, the correct answer is C) 3.2 * 10^(-11) m.
1.2×10^(-10) m - 0.000000000152 m
The sizes are already in the same unit, so we can directly subtract the values:
1.2×10^(-10) - 0.000000000152
To perform the subtraction, we need to express both values in scientific notation:
1.2×10^(-10) - 1.52×10^(-10)
To subtract these values, we subtract the coefficients and keep the same exponent:
(1.2 - 1.52) × 10^(-10)
The result is -0.32 × 10^(-10) m.
From the given options, the correct answer is C) 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 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 9.83×10^−6 m.
A red blood cell has a bigger diameter than a platelet by 5.17×10^−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 9.83×10^−6 m.
A red blood cell has a bigger diameter than a platelet by 5.17×10^−6 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 given diameters of the platelet and red blood cell:
Platelet diameter: 2.33×10^(-6) m
Red blood cell diameter: 0.0000075 m
Comparing the two values, we see that the red blood cell has a larger diameter than a platelet.
To determine the difference in their diameters, we subtract the diameter of the platelet from the diameter of the red blood cell:
0.0000075 m - 2.33×10^(-6) m
To perform the subtraction, we need to express both values in the same format.
2.33×10^(-6) m can be rewritten as 0.00000233 m.
Now, we can simply subtract the values:
0.0000075 m - 0.00000233 m = 0.00000517 m
Therefore, the red blood cell has a bigger diameter than a platelet by 0.00000517 m.
From the given options, the correct answer is: A red blood cell has a bigger diameter than a platelet by 5.17×10^−6 m.
Platelet diameter: 2.33×10^(-6) m
Red blood cell diameter: 0.0000075 m
Comparing the two values, we see that the red blood cell has a larger diameter than a platelet.
To determine the difference in their diameters, we subtract the diameter of the platelet from the diameter of the red blood cell:
0.0000075 m - 2.33×10^(-6) m
To perform the subtraction, we need to express both values in the same format.
2.33×10^(-6) m can be rewritten as 0.00000233 m.
Now, we can simply subtract the values:
0.0000075 m - 0.00000233 m = 0.00000517 m
Therefore, the red blood cell has a bigger diameter than a platelet by 0.00000517 m.
From the given options, 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 1.45×10^9 , while India’s population is approximately 1,400,000,000. How many more people live in China than in India?(1 point)
5×10^8
5×10^7
5×10^10
5×10^9
5×10^8
5×10^7
5×10^10
5×10^9
To find the difference in population between China and India, we 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 perform the subtraction, we need to convert the population of India to scientific notation:
India's population: 1.4×10^9
Now, we can subtract the values:
1.45×10^9 - 1.4×10^9
To subtract these values, we subtract the coefficients:
(1.45 - 1.4) × 10^9 = 0.05 × 10^9
Therefore, there are 0.05 × 10^9 more people living in China than in India.
From the given options, the correct answer is: 5×10^7.
China's population: 1.45×10^9
India's population: 1,400,000,000
To perform the subtraction, we need to convert the population of India to scientific notation:
India's population: 1.4×10^9
Now, we can subtract the values:
1.45×10^9 - 1.4×10^9
To subtract these values, we subtract the coefficients:
(1.45 - 1.4) × 10^9 = 0.05 × 10^9
Therefore, there are 0.05 × 10^9 more people living in China than in India.
From the given options, the correct answer is: 5×10^7.
Ty<3
You're welcome! If you have any more questions, feel free to ask.