The temperature, in degrees Fahrenheit, over a twelve hour period is given by the function T(t) = ‐0.5t^{2} + 6t + 30, where t = 0 denotes 6:00 a.m. When is the morning temperature 47.5o F?

(A) |
12 noon |

(B) |
11:00 a.m. |

(C) |
10 a.m. |

(D) |
9:00 a.m. |