Question

Subtract 4.66×10−5−7.34×10−7 (1 point)

Answer 1

[AI-generated answer — Bot GPT 3.5]

To subtract 4.66 × 10^(-5) from 7.34 × 10^(-7), we need to subtract the numerical parts and keep the same exponent:

(7.34 × 10^(-7)) - (4.66 × 10^(-5))

= 7.34 × 10^(-7 - (-5)) - 4.66

= 7.34 × 10^(-7 + 5) - 4.66

= 7.34 × 10^(-2) - 4.66

= 0.0734 - 4.66

= -4.5866

So, the result is approximately -4.5866.

Answer 2

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. (1 point) Responses $1.0183×1024 1.0183 dollars times 10 superscript 24 baseline $3.0015×1013 3.0015 dollars times 10 superscript 13 baseline $2.9219×1013 2.9219 dollars times 10 superscript 13 baseline $2.9219×1011

Answer 3

[AI-generated answer — Bot GPT 3.5]

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

= $2.9617 × 10^13 - $3.98 × 10^11

= ($2.9617 - $0.398) × 10^13

= $2.5637 × 10^13

So, the debt increased by $2.5637 × 10^13 or $25,637,000,000,000.

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 2.72×10−10 m 2.72 times 10 superscript negative 10 baseline m 3.2×10−11 m 3.2 times 10 superscript negative 11 baseline m 3.2×10−9 m 3.2 times 10 superscript negative 9 baseline 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

= 1.52 × 10^(-10) m - 1.2 × 10^(-10) m

= (1.52 - 1.2) × 10^(-10) m

= 0.32 × 10^(-10) m

= 3.2 × 10^(-11) m

So, the difference between the sizes of these atoms is 3.2 × 10^(-11) 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) Responses A platelet has a bigger diameter than a red blood cell by 5.17×10−6 m. A platelet has a bigger diameter than a red blood cell by 5.17 times 10 superscript negative 6 baseline m. A red blood cell has a bigger diameter than a platelet by 5.17×10−6 m. A red blood cell has a bigger diameter than a platelet by 5.17 times 10 superscript negative 6 baseline 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 9.83 times 10 superscript negative 6 baseline m. A red blood cell has a bigger diameter than a platelet by 9.83×10−6 m.

Answer 7

[AI-generated answer — Bot GPT 3.5]

To determine which blood component has a bigger diameter, we 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 the two values, we can see that the red blood cell has a bigger diameter since 0.0000075 m is larger than 2.33 × 10^(-6) m.

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

0.0000075 m - 2.33 × 10^(-6) m

= 7.5 × 10^(-6) m - 2.33 × 10^(-6) m

= (7.5 - 2.33) × 10^(-6) m

= 5.17 × 10^(-6) m

Therefore, a red blood cell has a bigger diameter than a platelet by approximately 5.17 × 10^(-6) m.

Answer 8

China and India are the most populous countries in the world. China’s population is approximately 1.45×109 , while India’s population is approximately 1,400,000,000. How many more people live in China than in India?(1 point) Responses 5×109 5 times 10 superscript 9 baseline 5×107 5 times 10 superscript 7 baseline 5×108 5 times 10 superscript 8 baseline 5×1010

Answer 9

[AI-generated answer — Bot GPT 3.5]

To find the difference in population between China and India, we subtract India's population from China's population:

China's population: 1.45 × 10^9
India's population: 1,400,000,000

1.45 × 10^9 - 1,400,000,000

To subtract them, we convert China's population to the same scale as India's population:

1.45 × 10^9 - 1.4 × 10^9

= 0.05 × 10^9

= 5 × 10^8

Therefore, there are 500,000,000 more people in China than in India. The correct response is 5 × 10^8.

Answer 10

[AI-generated answer — Explain Bot]

To subtract numbers in scientific notation, you should always ensure that the exponents (the part after "x10") are the same. In this case, we have:

4.66×10^(-5) - 7.34×10^(-7).

To make the exponents the same, we can rewrite the second number as 0.0734×10^(-5) (by moving the decimal point two places to the right). Now that the two numbers have the same exponent (-5), we can subtract them:

4.66×10^(-5) - 0.0734×10^(-5).

Subtracting the decimal parts, we get:

4.66 - 0.0734 = 4.5866.

Now, we keep the common exponent (-5) and write the result as:

4.5866×10^(-5).

Therefore, the final answer is 4.5866×10^(-5).