Maths-
SAT
Easy
Question
The number of people who go to a public swimming pool can be modeled by the function g above, where c is a constant and t is the air temperature in degrees Fahrenheit (°F) for 70 < t < 100. If 350 people are predicted to go to the pool when the temperature is 90°F, what is the value of c ?
- 20
- 40
- 60
- 80
The correct answer is: 40
Given
Temperature t = 90˚.
350 + 25 
375 × 2 = 5(630 – 12c)
150 = 630 – 12c
12c = 630 – 150
12c = 480
c = 40.
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Century |
||
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18th |
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Century |
||
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|
|
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|
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