Which pair of numbers shows the second number is an estimation of the first?(1 point)
0.00345; 0.004
0.00345; 0.003
345; 400
275; 200
Apologies for the mistake. The correct answer is "2.520 × 10^3." Thank you for pointing out the error.
0.00345; 0.003
4,600,000,000
Apologies for the confusion. The correct answer is:
3.487×10^7
The expression equal to 5.1×10^−3 is:
3.9×10^−3 + 1.2×10^−3
Apologies for the oversight. The height of Mt. Everest, expressed in scientific notation, is:
2.9×10^4 ft.
To find the increase in the world's population, we subtract the population in 1500 CE from the population in 2020.
7.8×10^9 - 4.5×10^8 = 7.35×10^9
Therefore, the world's population increased by approximately 7.35×10^9.
Bot, the answer was actually 2.4×10^29
Among the given options, the number higher than 1.429 × 10^−4 is:
1.429 × 10^−3
To convert 8.0724×10^−12 centimeters to kilometers, we can use the conversion factor of 1 kilometer = 100,000 centimeters.
First, we divide 8.0724 by 100,000 to convert it to kilometers:
8.0724 × 10^−12 / 100,000 = 8.0724 × 10^−17 kilometers.
The correct answer is:
8.0724×10^−17 kilometers.
The number 5E−7 in scientific notation is equivalent to 5×10^−7.
No bot, the answer is 5.478×10^6lb.
To find the number of pennies in the pile, we divide the total weight of the pile by the weight of a single penny:
3.596×10^4 lb / 5.8×10^−3 lb = 6.2×10^6 pennies
Therefore, there are approximately 6.2×10^6 pennies in the pile.
To find the number of years it will take to yield $6.42×10^4, we divide the desired amount by the annual interest:
6.42×10^4 / $802.50 = 8×10^1 years
Therefore, it will take approximately 8×10^1 (80) years to yield $6.42×10^4.
To find the difference in tons of paper and plastic recycled in 2010, we subtract the amount of plastic recycled from the amount of paper recycled:
4.6×10^7 tons - 2,600,000 tons = 4.34×10^7 tons
Therefore, 4.34×10^7 tons more paper was recycled than plastic in 2010.
Apologies for the mistake. You are correct.
The actual answer is 2.4×10^29 atoms. Thank you for pointing out the error.
Apologies for the mistake. You are correct.
The actual answer is 5.478×10^6 lb. Thank you for pointing out the error.
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Which number is correctly written in scientific notation?(1 point)
0.2520 × 10^−3
2.520 × 10^3
25.20 × 10^3
10 × 10^3
thats wrong bot
The age of Earth is about 4.6×10^9 years old. What is the number in decimal notation?(1 point)
46,000,000,000
4.6000000000
0.0000000046
4,600,000,000
Use scientific notation to compare these numbers: 3,478,660; 34,870,000; and 34,786,600. Which number has the greatest value?(1 point)
3.47866×10^7
34,870,000
3.487×10^7
3.47866×10^6
Bot, choose one of the options
3.47866×10^7
34,870,000
3.487×10^7
3.47866×10^6
The density of oxygen is about 1.429 × 10^−4 grams per liter. Which number is higher than 1.429 × 10^−4?(1 point)
1.429 × 10^−6
1.429 × 10^−5
1.429 × 10^−3
4.129 × 10^−4
Convert 8.0724×10^−12 centimeters to kilometers. Express the answer to the exact decimal place.
Note: 1 kilometer is equal to 100,000 centimeters.
(1 point)
80.724×10^−18 kilometers
8.0724×10^−7 kilometers
8.0724×10^−14 kilometers
8.0724×10^−17 kilometers
Linda converted 0.0005 liters to milliliters using a calculator. The calculator displayed the number 5E−7. What is this number in scientific notation?(1 point)
5+10^−7
5×10^7
−7×10^5
5×10^−7
Which expression is equal to 5.1×10^−3?(1 point)
3.9×10^−3+1.2×10^−3
3.5×10^3+1.6×10^−6
2.9×10^−3+1.2×10^−3
2.2×10^−1+2.9×10^−2
Denali, which is about 20,000 ft. above sea level, is the highest mountain in the United States. Mt. Everest, the highest mountain on earth, is about 9×10^3 ft. higher than Denali. About how high is Mt. Everest? The answer should be in scientific notation.(1 point)
Responses
1.1×10^3 ft.
2.9×10^4 ft.
29,000 ft.
2.9×10^3 ft.
Write the answer in scientific notation, Bot
In 1500 CE, the world’s population was about 4.5×10^8. In 2020, the world’s population was about 7.8×10^9. Find how much the world’s population increased. (1 point)
12.3×10^9
8.25×10^9
7.35×10^9
3.3×10^9
In 2010, approximately 4.6×10^7 tons of paper were recycled. In the same year, an estimated 2,600,000 tons of plastics were recycled. How many more tons of paper was recycled than plastic in 2010?(1 point)
7.20×10^7
4.34×10^7
434×10^7
4.34×10^2
There are about 6×10^19 atoms in a grain of sand. A cubic foot of sand can hold about 4×10^9 grains of sand of average size. Using those figures, how many atoms would you expect to find in a cubic foot of sand? Write the answer in scientific notation.(1 point)
2.4×10^28
2.4×10^29
24×10^29
24×10^28
A gallon of water weighs about 8.3 lb. An Olympic-sized swimming pool holds 6.6×10^5 gallons. What is the approximate weight of the water in an Olympic-sized swimming pool? Write the answer in scientific notation.(1 point)
54.78×10^6lb.
5.478×10^6lb.
5.478×10^5lb.
54.78×10^5lb.
A penny weighs 5.8×10^−3 lb. How many pennies are in a pile of pennies that weighs 3.596×10^4 lb.? Write the answer in scientific notation.(1 point)
0.62×10^7
6.2×10^6
6.2×10^8
6.2×10^−7
A bank deposit yields $802.50 in interest every year. How many years will it take to yield 6.42×10^4 dollars? Write the answer in scientific notation.(1 point)
1.25×10^2
8×10^2
8×10^4
8×10^1
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To find the height of Mt. Everest, we add the height difference (9×10^3 ft) to the height of Denali (20,000 ft).
20,000 ft + 9×10^3 ft = 29,000 ft
Therefore, Mt. Everest is about 29,000 ft high.
The answer is expressed in decimal notation as 29,000 ft.
To find the approximate weight of the water in an Olympic-sized swimming pool, we multiply the number of gallons of water by the weight of one gallon of water:
6.6×10^5 gallons x 8.3 lb = 54.78×10^6 lb
Therefore, the approximate weight of the water in an Olympic-sized swimming pool is approximately 54.78×10^6 lbs.
0.2520 × 10^−3
To compare numbers in scientific notation, we compare the coefficients.
The coefficients are:
3.47866
34.87
3.487
From these values, we see that 34.87 is the greatest. Therefore, the number 34,870,000 has the greatest value.
To find the number of atoms in a cubic foot of sand, we multiply the number of grains of sand by the number of atoms in each grain of sand:
4×10^9 grains x 6×10^19 atoms = 24×10^28 atoms
Therefore, you would expect to find approximately 24×10^28 atoms in a cubic foot of sand.