1.2 Rounding & Calculators 19

Plankton In Exercises 9 and 10, write the length of the plankton in exponential notation. Then use the chart to classify the plankton. (See Examples 3 and 4.)

9. Copepod: 0.0012 meter 10. Golden algae: 0.0000091 meter

11. Marine Virus Marine viruses are a type of plankton. The length of a marine virus is less than 2.0 × 10− 7 meter. Write this number in standard decimal notation and describe it in words. Use the chart above to classify the virus. (See Examples 3 and 4.)

12. Blue Whale A blue whale eats about 5000 pounds of plankton per day during a 120-day feeding period. How many pounds of plankton does the whale eat in one feeding period? Write your answer in standard decimal notation and in exponential notation. (See Examples 3 and 4.)

The term plankton comes from the Greek word planktos, which means “drifter.”

Cla

ss

Femto-

Pico-

Nano-

Micro-

Meso-

Length (meters)

Classes of Plankton

2.0

10

7

2.0

10

6

2.0

10

5

2.0

10

4

2.0

10

3

2.0

10

2

2.0

10

1

Macro-

Mega-

virusessans.

wurunnewe

n

e viruses are a type of plankton. The length of a ss than 2.0 × 10−7 meter. Write this number in standard nd describe it in words. Use the chart above . (See Examples 3 and 4.)

whale eats about 5000 pounds uring a 120-day feeding

nds of plankton ne feeding wer in

n and

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