Build a variable expression for the given phrase.Six times a number
A. 6 - x
B. 
C. 6 + x
D. 6x
Answer: D
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Solve.In an automobile, cylinder displacement is measured either in cubic inches or liters. What is the cylinder displacement in liters of a 350-cu in. engine? (Round to the nearest liter.)
A. 7 liters B. 8 liters C. 6 liters D. 5 liters
Evaluate the expression using a rule for exponents.(-3)0
A. 0 B. -3 C. -1 D. 1
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
Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form.(-5
+ 5i
)3
A. 5
+ 5i
B. 500
+ 500i
C. 50
+ 50i
D. 15
+ 15i