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The radius of a hydrogen atom is 0.0000000529177 of a millimeter. Express this number as an approximation.(1 point)
0.0000000053
0.0000005
0.00000006
0.00000005
The radius of a hydrogen atom, approximately 0.0000000529177 mm, can be expressed as an approximation of 0.00000005 mm.
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)
2 x 10^11
3 x 10^11
3 x 10^-11
2.97 x 10^11
The closest estimation of the federal debt of Country C at the end of fiscal year 2004, $278,560,125,000, in the form of a single digit times an integer power of 10, would be 2.79 x 10^11.
How many times less is 10^2 than 10^6 ? Express your answer as an integer power of 10.(1 point)
10^4
10,000
10^-4
0.0001
To calculate how many times less 10^2 (100) is than 10^6 (1,000,000), we can divide 10^6 by 10^2:
10^6 / 10^2 = 10^(6-2) = 10^4
Therefore, 10^2 is 10^4 times less than 10^6.
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)
3 x 10^9
3 x 10^-8
3 x 10^8
3 x 10^-9