Solve.The monthly average high temperature T in Winston-Salem during the period from May to September can be approximated using T(t) = 81.6 + 5.4 sin(1.47t - 9.60),where t is the month (t = 1 corresponds to January) and T is the monthly average high temperature in degrees Fahrenheit. What is the maximum average high temperature, and in which month does it occur?
A. 87.0° F in August
B. 86.1° F in July
C. 87.0° F in July
D. 81.6° F in August
Answer: C
Mathematics
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