Write the interval as an inequality involving x, and illustrate the inequality using the real number line.[2, ?)
A. x ? 2
B. x ? 2
C. x > 2
D. x > 2
Answer: B
Mathematics
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Solve the problem.Find the sum of the infinite series 1 + 8r + 5r2 + 8r3 + r4 + 8r5 + 5r6 + 8a7 + r8 ... for those values of r for which it converges.
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression. Do not use a calculator.sec ?, if cos ? = 
and sin ? > 0
A. 2
B. - 2
C. 
D. 
Mathematics
Find the absolute value of the complex number. Round your answer to two decimal places, if necessary.
+ 4i
A. 2.14 B. 2.77 C. 16.36 D. 4.04
Mathematics
Multiply.(7i)(-10i)
A. -17 B. -70 C. 17 D. 70
Mathematics