Trigonometry Question
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Grade 11 Trigonometry CCSS: HSF-TF.B.5
A lake’s surface temperature in degrees Fahrenheit varies sinusoidally over the year. The warmest temperature, 78°F, occurs on August 1. The coldest temperature, 42°F, occurs on February 1. In a model where day 0 is January 1, what is the lake temperature on May 15 (day 134)?
- 54°F
- 59°F
- 64°F
- 69°F
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