Solve the problem.The temperature on a February morning is -8° F at 7a.m. If the temperature drops 5° by 8 a.m., rises 4° by 9 a.m., and then drops 9° by 10a.m., find the temperature at 10 a.m.
A. 18° F
B. -18° F
C. -26° F
D. 26° F
Answer: B
Mathematics
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Find an equation of a parabola satisfying the given conditions.Focus at (0, 5), directrix y = -5
A. y = 
x2
B. y2 = 20x
C. y = 
x2
D. y2 = 5x
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Mathematics