Solve the problem.A building 220 feet tall casts a 70 foot long shadow. If a person looks down from the top of the building, what is the measure of the angle between the end of the shadow and the vertical side of the building (to the nearest degree)? (Assume the person's eyes are level with the top of the building.)
A. 19°
B. 71°
C. 18°
D. 72°
Answer: C
Mathematics
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Solve the equation.21b + 24 = -11b
A. 
B. - 
C. - 
D. - 
Mathematics
Find all complex-number solutions by completing the square.x2 = -10x - 32
A. x = 5 ± i
B. x = -5 ± 7i
C. x = -5 ± 
D. x = -5 ± i
Mathematics
Use the x-intercepts to find the intervals on which the graph of f is above and below the x-axis.f(x) = (x + 13)2
A. above the x-axis: (-?, -13) below the x-axis: (-13, ?) B. above the x-axis: no intervals below the x-axis: (-?, -13), (-13, ?) C. above the x-axis: (-13, ?) below the x-axis: (-?, -13) D. above the x-axis: (-?, -13), (-13, ?) below the x-axis: no intervals
Mathematics
Complete.704 oz = 
lb
A. 176 B. 44 C. 70 D. 45
Mathematics