Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
a = 4, A = 30°; Find b, c, and B.
A. b = 6.93
c = 9
B = 70°
B. b = 6.93
c = 9
B = 60°
C. b = 6.93
c = 8
B = 60°
D. b = 6.93
c = 8
B = 70°
Answer: C
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A sample statistic and margin of error are given. Find the confidence interval likely to contain the population parameter of interest and answer the question.Following the Republican National Convention, a poll of voters in a Central Illinois community showed that 57.0% would choose the Republican ticket to win over the Democrat ticket no matter whom the Democrats chose for vice-president. The margin of error was 4.8 percentage points. Should the Democrats expect to lose Central Illinois?
A. 54.6% to 59.4%; yes B. 57.0% to 61.8%; yes C. 52.2% to 61.8%; yes D. 47.4% to 57.0%; no
Rewrite the inequality using interval notation. Then graph the inequality.-2 ? x ? 2
A. (-2, 2]
B. (-2, 2)
C. [-2, 2)
D. [-2, 2]
Solve the equation.
x + 
= 
x + 
A. -12 B. 4 C. -4 D. 3
Write the system of equations associated with the augmented matrix. Do not solve.
A. -6x + 6y = -5 7x + 5y = 6 B. 6x - 6y = -5 7x + 5y = 6 C. -6x + 6y = 0 7x + 5y = 0 D. -6x + 6y = -5 5x + 7y = 6