SOLUTION: Scientific Notation in problem solving. Solve. Coral Reefs. There are 10 million bacteria per square centimeter of coral in a coral reef. The coral reefs near the Hawaiian Islan

Question 976809: Scientific Notation in problem solving. Solve.
Coral Reefs. There are 10 million bacteria per square centimeter of coral in a coral reef. The coral reefs near the Hawaiian Islands cover 14,000 km^2. How many bacteria are there in Hawaii's coral reef?
My answer was 1.4 x 10^3. The books answer was 1.4 x 10^21. If I'm wrong, show me how it's done.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Scientific Notation in problem solving. Solve.
Coral Reefs.
There are 10 million bacteria per square centimeter of coral in a coral reef.
10 million = 10*10^6* = 10^7 (bacteria)/cm^2
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The coral reefs near the Hawaiian Islands cover 14,000 km^2.
1 km^2 (100,000 cm/1 km)^2 = 10^10 cm^2
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14000 km^2 = 1.4*10^3*(10^10)cm^2 = 1.4*(10^13)cm^2
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How many bacteria are there in Hawaii's coral reef?
Ans: 1.4(10^13)*10*10^7 = 1.4*10^20 bacteria in the reef.
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Cheers,
Stan H.
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