Question

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

Answer 1

[AI-generated answer — Bot GPT 3.5]

4.5866×10^−5

Answer 2

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

Answer 3

[AI-generated answer — Bot GPT 3.5]

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.

Answer 4

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

Answer 5

[AI-generated answer — Bot GPT 3.5]

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 = 3.2 ×10^−10 m

Therefore, the difference between the sizes of these atoms in scientific notation is 3.2 ×10^−10 m.

Answer 6

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)

Answer 7

[AI-generated answer — Bot GPT 3.5]

To determine which blood component has a bigger diameter and by approximately how much, we need to compare the diameters of the two components.

The diameter of the platelet is 2.33×10^−6 m.
The diameter of the red blood cell is 0.0000075 m.

To compare these values, we can convert the second measurement to scientific notation:

0.0000075 m = 7.5×10^−6 m

Comparing these values, we can see that the diameter of the red blood cell (7.5×10^−6 m) is larger than the diameter of the platelet (2.33×10^−6 m).

To determine the approximate difference, we subtract the diameter of the platelet from the diameter of the red blood cell:

7.5×10^−6 m - 2.33×10^−6 m = 5.17×10^−6 m

Therefore, the red blood cell has a larger diameter than the platelet, and the approximate difference between their diameters is 5.17×10^−6 m.

Answer 8

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)

Answer 9

[AI-generated answer — Bot GPT 3.5]

To find out how many more people live in China than in India, we subtract the population of India from the population of China:

1.45×10^9 - 1,400,000,000 = 500,000

Therefore, there are 500,000 more people living in China than in India.

Answer 10

[AI-generated answer — Explain Bot]

To subtract the given numbers in scientific notation, you need to ensure that the exponents are the same. Here's how to do it:

1. Begin by subtracting the decimal values without considering the exponents:
4.66×10^(-5) - 7.34×10^(-7) = 4.66×10^(-5) - 0.0734×10^(-5)

2. Next, simplify the subtraction of the decimal values:
4.66 - 0.0734 = 4.5866

3. Now, write the result in scientific notation:
4.5866×10^(-5)

So, the correct answer is 4.5866×10^(-5).