Solve the problem. See Example 1.Researchers at West Okoboji Lake tagged 840 fish. A later...
Solve the problem. See Example 1.
Researchers at West Okoboji Lake tagged 840 fish. A later sample of 1000 fish contained 18 that were tagged. Approximate the fish population in West Okoboji Lake to the nearest hundred.
EXAMPLE 1 Applying Proportions
After Lee Ann Spahr pumped 5.0 gal of gasoline, the display showing the price read $23.20. When she finished pumping the gasoline, the price display read $67.28. How many gallons did she pump? To solve this problem, set up a proportion, with prices in the numerators and gallons in the denominators. Let x = the number of gallons pumped.
She pumped a total of 14.5 gal. Check this answer. Notice that the way the proportion was set up uses the fact that the unit price is the same, no matter how many gallons are purchased.
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