Find the sum of the arithmetic series using a formula.-11 + (-9) + (-7) + ... + 47 + 49
A. 627
B. 551
C. 589
D. 570
Answer: C
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Convert the common fraction into decimal form. If necessary, round to the nearest thousandth.
A. 0.752 B. 1.329 C. 1.439 D. 1.139
Find the indicated probability or percentage for the normally distributed variable.The mean weekly income of teachers in one state is $390 with a standard deviation of 
The incomes are approximately normally distributed. What is the probability that a randomly selected teacher earns more than $425 a week?
A. 0.099 B. 0.215 C. 0.218 D. 0.782
Solve. Write a mixed numeral for the answer.A car traveled 327 miles on 15
gallons of gas. How many miles per gallon did it get?
A. 21
mpg
B. 22 mpg
C. 21
mpg
D. 21 mpg
For an election with four candidates (A, B, C, and D) we have the following preference schedule:
How many pairwise comparisons does candidate B win?
A. 0 B. 1 C. 2 D. 3 E. none of these