Estimate the order of magnitude of the number of seconds in a century.

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Solution

$1 c e n t u r y = 100 y e a r s = 100 \times 365 \times 24 \times 60 \times 60 s e c o n d s = 3153600000 s = 3.1536 \times 10^{9} s$
So the order of magnitude is 9.

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Estimate the order of magnitude of the number of seconds in a century.

1 century=100 years=100×365×24×60×60 seconds=3153600000 s=3.1536×109 s So the order of magnitude is 9.

$1 c e n t u r y = 100 y e a r s = 100 \times 365 \times 24 \times 60 \times 60 s e c o n d s = 3153600000 s = 3.1536 \times 10^{9} s$
So the order of magnitude is 9.