Question

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

−2.68×102
negative 2.68 times 10 squared

−4.5866×10−5
negative 4.5866 times 10 superscript negative 5 baseline

4.5866×10−5
4.5866 times 10 superscript negative 5 baseline

2.68×102
2.68 times 10 squared

Answer 1

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)
Responses

$1.0183×1024
1.0183 dollars times 10 superscript 24 baseline

$2.9219×1013
2.9219 dollars times 10 superscript 13 baseline

$2.9219×1011
2.9219 dollars times 10 superscript 11 baseline

$3.0015×1013
3.0015 dollars times 10 superscript 13 baseline

Answer 2

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

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

2.72×10−10 m
2.72 times 10 superscript negative 10 baseline m

3.2 ×10−10 m
3.2 times 10 superscript negative 10 baseline m

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

Answer 3

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 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 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 9.83 times 10 superscript negative 6 baseline m.

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 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.

Answer 4

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

5×1010
5 times 10 superscript 10 baseline

5×107
5 times 10 superscript 7 baseline

5×108
5 times 10 superscript 8 baseline

5×109
5 times 10 superscript 9 baseline

Answer 5

3/5
A
D
A
D
D
Those are the correct answers