Express the number in terms of i.
A. -5i
B. -5
C. 5i
D. ±5i
Answer: C
Mathematics
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Solve the problem.From a distance of x feet to a 110-meter-high radio tower, the angle of elevation is ? degrees. Then 
Use a reciprocal identity to rewrite this formula.
A. 110 cot ?
B. 
C. 110 sec ?
D. 
Mathematics
Find an equation of the line satisfying the following conditions.If possible, write the equation in slope-intercept form. Vertical, passing through (-8.66, -2.99)
A. y = -8.66 B. x = -2.99 C. y = -2.99 D. x = -8.66
Mathematics
Find the unknown length in the right triangle. If necessary, round to the nearest tenth.
A. 15 yd B. 12 yd C. 14 yd D. 11 yd
Mathematics
Find the axis of symmetry of the quadratic function.f(x) = 11(x - 5)2 + 8
A. x = 11 B. x = 8 C. x = -5 D. x = 5
Mathematics