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
0.00000005
0.00000005
0.00000006
0.00000005
How many times is 4 × 10^4 larger than 2 × 10^2?(1 point)
Responses
2
2
200
200
2,000
2,000
20
2,000
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 × 10^11
2.79 times 10 superscript 11 baseline
2 × 10^11
2 times 10 superscript 11 baseline
3 × 10^11
3 times 10 superscript 11 baseline
3 × 10^−11
2.79 × 10^11
How many times less is 10^2 than 10^6? Express your answer as an integer power of 10.(1 point)
Responses
10^4
10 superscript 4 baseline
10,000
10,000
10^−4
10 superscript negative 4 baseline
0.0001
0.0001
10^4
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 × 10^n where 1 < a < 10 and is a one-digit number.(1 point)
Responses
3 × 10^−8
3 times 10 superscript negative 8 baseline
3 × 10^9
3 times 10 superscript 9 baseline
3 × 10^8
3 times 10 superscript 8 baseline
3 × 10^−9