Calculate 6.25×10^6−4.73×10^6 . Express your answer in scientific notation to 2 decimal places.
To subtract these numbers in scientific notation, we need to have the same exponent. Let's convert them to have the same exponent of 10 by moving the decimal point:
6.25×10^6 = 6250000
4.73×10^6 = 4730000
Now we can subtract:
6250000 - 4730000 = 1520000
To express this in scientific notation, we need to move the decimal point so that there is only one non-zero digit before it:
1520000 = 1.52×10^6
Therefore, 6.25×10^6 - 4.73×10^6 = 1.52×10^6.
Human hair grows at a rate of about 6.849×10^−4 cm per hour to 2.329×10^−2 cm per hour. The rate depends on gender, genetics, age, and health. Find the difference between the high end and the low end of the range. Express your answer in scientific notation. Do not round your answer.(1 point)
Find 0.078−(5.2×10^−3) . Express your answer in scientific notation. Do not round your answer.(1 point)
Subtract 4.66×10^−5−7.34×10^−7 (1 point)
−2.68×10^2
4.5866×10^−5
2.68×10^2
−4.5866×10−5
The average distance from Earth to Mars is 2.25×10^8 km, and the distance from Earth to Neptune is 4.3514×10^9 km. How much farther is Neptune from Earth than Mars? Express your answer in scientific notation. Do not round your answer.(1 point)
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)
$2.9219×1011
$2.9219×1013
$3.0015×1013
$1.0183×1024
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
To subtract these numbers, we need to have the same exponent. Let's convert them to have the same exponent of 10:
$2.9617×10^13 = $29.617×10^12
$3.98×10^11 = $0.398×10^12
Now we can subtract:
$29.617×10^12 - $0.398×10^12 = $29.219×10^12
Therefore, the debt increased by $29.219×10^12 in the 50-year period.
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
3.2×10^−11 m
3.2×10^−9 m
2.72×10^−10 m
3.2 ×10^−10 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
To subtract these numbers, we need to have the same exponent. Let's convert the size of the oxygen atom to scientific notation:
0.000000000152 m = 1.52×10^-10 m
Now we can subtract:
1.52×10^-10 m - 1.2×10^-10 m = 0.32×10^-11 m
Therefore, the difference between the sizes of these atoms is 0.32×10^-11 m or 3.2×10^-12 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
To determine which blood component has a bigger diameter and the approximate difference, we need to compare the diameters of the platelet and red blood cell:
Platelet diameter: 2.33×10^-6 m
Red blood cell diameter: 0.0000075 m
Comparing these two diameters, we see that the red blood cell has a larger diameter than the platelet.
To find the approximate difference, we can subtract the diameter of the platelet from the diameter of the red blood cell:
0.0000075 m - 2.33×10^-6 m
To subtract these numbers, we need to have the same exponent. Let's convert the diameter of the platelet to the same form as the red blood cell:
2.33×10^-6 m = 0.00000233 m
Now we can subtract:
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 or 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)
Responses
To find 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 subtract these numbers, we can keep China's population in scientific notation to have consistent units:
1.45×10^9 - 1.4×10^9
Now we can subtract:
1.45×10^9 - 1.4×10^9 = 0.05×10^9
Therefore, there are 0.05×10^9 or 5×10^7 more people in China than in India.
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
To find the difference between the sizes of the hydrogen and oxygen 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
To subtract these numbers, we need to have the same exponent. Let's convert the size of the oxygen atom to scientific notation:
0.000000000152 m = 1.52×10^-10 m
Now we can subtract:
1.52×10^-10 m - 1.2×10^-10 m = 0.32×10^-10 m
Therefore, the difference between the sizes of the hydrogen and oxygen atoms is 0.32×10^-10 m.
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)
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)
@that one dumb kid IS a stupid kid ngl. He doesnt correct the bot. Both r idiots
@anonymously then what are the right answers I need them PLEASE
Just look up the questions, the other two then us dont know any better.
To subtract these numbers, we need to have the same exponent. Let's convert them to have the same exponent of 10 by moving the decimal point:
4.66×10^-5 - 7.34×10^-7
4.66×10^-5 = 0.0466×10^-3
7.34×10^-7 = 0.0000734×10^-3
Now, we can subtract:
0.0466×10^-3 - 0.0000734×10^-3 = 0.0465266×10^-3
Therefore, 4.66×10^-5 - 7.34×10^-7 = 0.0465266×10^-3 or 4.65266×10^-3.
To find the difference between the high end and low end of the range, we need to subtract the low end from the high end:
2.329×10^-2 cm/hr - 6.849×10^-4 cm/hr
To subtract these numbers in scientific notation, we need to have the same exponent. Let's convert them to have the same exponent of 10 by moving the decimal point:
2.329×10^-2 cm/hr = 0.2329×10^-1 cm/hr
6.849×10^-4 cm/hr = 0.06849×10^-1 cm/hr
Now we can subtract:
0.2329×10^-1 cm/hr - 0.06849×10^-1 cm/hr = 0.16441×10^-1 cm/hr
Therefore, the difference between the high end and low end of the range for hair growth rate is 0.16441×10^-1 cm/hr.
To subtract these numbers, we need to have the same exponent. Let's convert 0.078 to scientific notation:
0.078 = 7.8×10^-2
Now we can subtract:
7.8×10^-2 - 5.2×10^-3
To subtract these numbers in scientific notation, we need to have the same exponent. Let's convert 5.2×10^-3 to have the same exponent of 10:
5.2×10^-3 = 0.052×10^-1
Now we can subtract:
7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 7.8×10^-2 - 0.052×10^-1 = 0.1641×10^-1 cm/hr
Therefore, 0.078 - (5.2×10^-3) = 0.1641×10^-1 cm/hr.
To find the difference in distance between Neptune and Mars, we need to subtract the distance from Earth to Mars from the distance from Earth to Neptune:
4.3514×10^9 km - 2.25×10^8 km
To subtract these numbers in scientific notation, we need to have the same exponent. Let's convert them to have the same exponent of 10 by moving the decimal point:
4.3514×10^9 km = 435.14×10^7 km
2.25×10^8 km = 22.5×10^7 km
Now we can subtract:
435.14×10^7 km - 22.5×10^7 km = 412.64×10^7 km
Therefore, Neptune is 412.64×10^7 km farther from Earth than Mars.