The radius of a hydrogen atom is 0.0000000529177 of a millimeter. Express this number as an approximation.(1 point)
Responses
0.0000000053
0.0000000053
0.0000005
0.0000005
0.00000006
0.00000006
0.00000005
0.00000005
The approximate value of the radius of a hydrogen atom is 0.00000005 millimeters.
How many times is 4 × 10^
4 larger than 2 × 102?(1 point)
Responses
200
200
2
2
2,000
2,000
20
20
The number 4 × 10^4 is 200 times larger than 2 × 10^2.
How many times is 4 × 10^4 larger than 2 × 10^2?(1 point)
Responses
200
200
2
2
2,000
2,000
20
20
The number 4 × 10^4 is 200 times larger than 2 × 10^2.
2x10^2
2 × 10^2 is equal to 200.
At the end of fiscal year 2004, the federal debt of Country C is $278,560,125,000. What is the closest estimation of this amount? Express your answer in the form of a single digit times an integer power of 10.(1 point)
Responses
2.79 × 1011
2.79 times 10 superscript 11 baseline
2 × 1011
2 times 10 superscript 11 baseline
3 × 1011
3 times 10 superscript 11 baseline
3 × 10−11
The closest estimation of the federal debt of Country C at the end of fiscal year 2004 is 2.79 × 10^11 (2.79 times 10 to the power of 11).
How many times less is 102 than 106? Express your answer as an integer power of 10.(1 point)
Responses
0.0001
0.0001
104
10 superscript 4 baseline
10,000
10,000
10−4
The number 102 is 10,000 times less than 106. This can be expressed as 10^-4 (10 to the power of -4).
Question
Roughly, it takes light less than 0.000000003 of a second to travel a one-meter distance. Express this number in the form of a × 10n where 1 < a < 10 and is a one-digit number.(1 point)
Responses
3 × 109
3 times 10 superscript 9 baseline
3 × 10−9
3 times 10 superscript negative 9 baseline
3 × 10−8
3 times 10 superscript negative 8 baseline
3 × 108