Expand, where i2 = -1.(-1 + i
)3
A. 8
B. 4 + 4i
C. 1
D. -1 - 3i
Answer: A
Mathematics
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Solve.
= 3 + 
A. 5, 8 B. -1 C. -5, -8 D. No solution
Mathematics
Solve the problem.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 5 miles? Round your answer to the nearest unit.
A. 1306 units B. 1244 units C. 1280 units D. 1263 units
Mathematics
Add or subtract as indicated.- 
- 
A. 1
B. - 
C. 
D. - 
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cot ? = -3, sec ? > 0Find sin 
.
A. 
B. 
C. - 
D. 
Mathematics