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)

Answer 1

$2.79 \times 10^{11}$

Answer 2

How many times less is 10^2 than 10^6? Express your answer as an integer power of 10.(1 point)

Answer 3

$10^2$ is $10^4$ times less than $10^6$.

Answer 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)

Answer 5

In scientific notation, we can express the number as $3 \times 10^{-9}$.