Question

Question
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

3 × 10−11
3 times 10 superscript negative 11 baseline

3 × 1011
3 times 10 superscript 11 baseline

2.79 × 1011
2.79 times 10 superscript 11 baseline

2 × 1011

Answer 1

Write the number in scientific form: 278,560,125,000 = 2.78560125 × 10^11. Rounding the coefficient to a single digit gives 3 × 10^11.