Solve the problem.DG's Plumbing and Heating charges $50 plus $75 per hour for emergency service. Bill remembers being billed just over $450 for an emergency call. How long to the nearest hour was the plumber at Bill's house?
A. 13 hours
B. 5 hours
C. 17 hours
D. 7 hours
Answer: B
Mathematics
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Use the inverse trig functions to express the angle in terms of the indicated unknown side. 
Express angle A in terms of c. Use one of the inverse trig functions tan-1, sin-1, or cos-1.
A. A = cos-1 
B. A = sin-1 
C. A = sin-1 
D. A = cos-1 
Mathematics
Solve the problem.An electric pole 15 ft high casts a shadow that is 7.5 ft long. What is the length of the shadow of a 22-ft pole?
A. 2 ft B. 8 ft C. 11 ft D. 14 ft
Mathematics
Subtract.8.3 - 5.724
A. 3.576 B. 2.624 C. 4.000 D. 2.576
Mathematics
Find the vertex and axis of symmetry of the graph of the function.f(x) = -3x2 - 2x - 12
A. 
; x = 
B. 
; x = - 
C. (3, -12); x = 3
D. 
; x = -3
Mathematics