Write the complex number in the form a + bi.3(cos 270° + i sin 270°)
A. 3
B. -3
C. -3i
D. 3i
Answer: C
Mathematics
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Raise the fraction to the indicated power.8 ? 102
A. 800 B. 8 C. 80,000 D. 80
Mathematics
Solve the problem.Tides go up and down in a 12.4-hour period. The average depth of a certain river is 10 m and ranges from 5 to 15 m. The variation can be approximated by a sine curve. Write an equation that gives the approximate variation y, if x is the number of hours after midnight and high tide occurs at 5:00 am.
A. y = 5 sin 
+ 10
B. y = 10 sin 
+ 5
C. y = 10 sin 
+ 5
D. y = 5 sin 
+ 10
Mathematics
Write the sentence as an equation.The quotient of 108 and three times 9 is 4.
A. 
= 4(9)
B. 
= 3(9)
C. 108 - 3(9) = 4
D. 
= 4
Mathematics
Write a system of linear inequalities that has the given graph.
A. 
B. 
C. 
D. 
Mathematics