Multiple Choice
The earth's circumference is approximately 40.1 Mm (megameters). What is this circumference in kilometers?
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1. Intro to Physics Units
Introduction to Units
Multiple Choice
Rewrite 299,800,000 m/s in scientific notation.
A
2.998×105
B
3.00×108
C
3.00×105
D
2.998×10-5
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Verified step by step guidance1
Identify the given number: 299,800,000 m/s.
Scientific notation expresses numbers as a product of a coefficient and a power of ten. The coefficient should be a number between 1 and 10.
Move the decimal point in 299,800,000 to the left until you have a number between 1 and 10. This gives you 2.998.
Count the number of places you moved the decimal point. In this case, you moved it 8 places to the left.
Express the number in scientific notation as \(2.998 \times 10^8\). Round the coefficient to three significant figures to get \(3.00 \times 10^8\).
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