Use De Moivre's theorem to simplify the expression. Write the answer in the form a + bi.
4
A. 
+ 
i
B. 
+ 
i
C. 81i
D. 
+ 
i
Answer: D
Mathematics
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250 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 75 and standard deviation ? = 10.Carol scored 85 points on the exam. In approximately what percentile of the class does this score place her?
A. 84th percentile B. 95th percentile C. 34th percentile D. 68th percentile E. none of these
Mathematics
Simplify by factoring out the given factor.15s1/7 - 7s-3/7; s-3/7
A. s1/3(15 - 7s4/7) B. s1/7(15s4/7 - 74/7) C. s-3/7(15s4/7 - 7s) D. s-3/7(15s4/7 - 7)
Mathematics
Write the fraction in simplest form using the method of your choice.
A. 
B. 3
C. 
D. 
Mathematics
Find the slope of the line containing the given points. Simplify if possible.(6, -5) and (-7, 3)
A. 
B. - 
C. 
D. - 
Mathematics