Question

express the number 554780000040 in scientific notation to three significant figures. answer: a 5.54×10¹¹ b 5.55×10¹² c 5.55×10¹¹ d 5.548×10¹²

Explanation:

Step1: Move decimal point

Move the decimal - point in 554780000040 to the left until there is only one non - zero digit to the left of the decimal point. We get 5.54780000040.

Step2: Count decimal places moved

We moved the decimal point 11 places to the left. So the number in scientific notation is \(5.54780000040\times10^{11}\).

Step3: Round to three significant figures

Rounding 5.54780000040 to three significant figures gives 5.55. So the number in scientific notation to three significant figures is \(5.55\times10^{11}\).

Answer:

C. \(5.55\times 10^{11}\)