Find the indicated roots. Write the answer in a + bi form.Square roots of i
A. -i, i
B. -1, 1
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
Answer: D
Mathematics
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Solve.After receiving an 8.5% raise, you now make $31.88 more than before. What was your salary prior to the raise?
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve and graph. Write the solution in interval notation.| x | > 4
A. (-4, 4)
B. (-?, -4) ? (4, ?)
C. (4, ?)
D. (-4, ?)
Mathematics
Solve.-6b + 8 + 4b = -3b + 13
A. b = -8 B. b = 5 C. b = -13 D. b = 13
Mathematics
Solve.In 1970, the population of a particular city is 785,000. In 1980, the population of the city is 689,300. Assume the population is decreasing according to the exponential-decay model. When will the population of the city be 100,000?
A. 2139 B. 2134 C. 2124 D. 2129
Mathematics