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.
A. 3×10^-¹¹
B. 2×10¹¹
C. 3×10¹¹
D. 2.79×10¹¹
5 answers
The closest estimation of the given amount is D. 2.79×10¹¹.
How many times less is 10² than 10⁶? Express your answer as an intger power of 10.
A. 10,000
B. 0.0001
C. 10⁴
D. 10^-⁴
A. 10,000
B. 0.0001
C. 10⁴
D. 10^-⁴
To determine how many times less 10² is than 10⁶, we can calculate the ratio of 10² to 10⁶:
10² / 10⁶ = 1 / 10⁴
Therefore, the answer is C. 10⁴.
10² / 10⁶ = 1 / 10⁴
Therefore, the answer is C. 10⁴.
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.
A. 3×10^-⁸
B. 3×10⁸
C. 3×10^-⁹
D. 3×10⁹
A. 3×10^-⁸
B. 3×10⁸
C. 3×10^-⁹
D. 3×10⁹
To express the given number in the form of a×10^n, where 1 < a < 10 and a is a one-digit number, we convert the number to scientific notation.
0.000000003 can be written as 3 × 10^(-9).
Therefore, the answer is C. 3×10^(-9).
0.000000003 can be written as 3 × 10^(-9).
Therefore, the answer is C. 3×10^(-9).
1 answer