Question

identify the greater number in each pair of numbers. justify each reasoning.
13 ( 9.9 cdot 10^{10} ) and ( 9.6 cdot 10^{11} ) 14 ( 5.8 cdot 10^{5} ) and ( 8.5 cdot 10^{3} )
15 ( 4.8 cdot 10^{-7} ) and ( 8.8 cdot 10^{-7} ) 16 ( 1.25 cdot 10^{-3} ) and ( 1.28 cdot 10^{-5} )
solve.
17 diego came across the following fun facts about the human body while searching the internet.
fill in the table by writing each figure in scientific notation.

Explanation:

Step1: 确定科学记数法的形式

科学记数法的形式为\(a\times10^{n}\)，其中\(1\leqslant|a|\lt10\)，\(n\)为整数。

Step2: 对\(1200000000000\)进行转化

\(1200000000000 = 1.2\times10^{12}\)

Step3: 对\(0.0000084\)进行转化

\(0.0000084=8.4\times10^{-6}\)

Step4: 对\(10200000\)进行转化

\(10200000 = 1.02\times10^{7}\)

Step5: 对\(100000\)进行转化

\(100000 = 1\times10^{5}\)

Step6: 对\(0.00108\)进行转化

\(0.00108 = 1.08\times10^{-3}\)

Step7: 对\(3000\)万进行转化

因为\(1\)万\( = 10000\)，所以\(3000\)万\(=3000\times10000 = 30000000=3\times10^{7}\)

Answer:

Fun Facts	Figures in Standard Form	Figures in Scientific Notation
Diameter of a red blood cell (\(m\))	\(0.0000084\)	\(8.4\times10^{-6}\)
Average number of times the human eye blinks in a year	\(10200000\)	\(1.02\times10^{7}\)
Number of strands of hair on human scalp	\(100000\)	\(1\times10^{5}\)
Width of a strand of human hair (\(cm\))	\(0.00108\)	\(1.08\times10^{-3}\)
Average number of times a human heart beats in its lifetime	\(3000\)万	\(3\times10^{7}\)