Without using a calculator, determine the value of the trigonometric function or state that the value is undefined.sin (405°)
A. 
B. - 
C. 
D. - 
Answer: A
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Write the imaginary numbers using the letter i.
A. 9i
B. i
C. ±9
D. -9i
Solve the problem.One Internet service provider has the following rate schedule for high-speed Internet service:Monthly service charge$18.001st 50 hours of usefreeNext 50 hours of use$0.25/hourOver 100 hours of use$1.00/hourWhat is the charge for 50 hours of high-speed Internet use in one month?What is the charge for 75 hours of high-speed Internet use in one month?What is the charge for 135 hours of high-speed Internet use in one month?
Fill in the blank(s) with the appropriate word(s).
Graph the inequality.y > 2x
A. 
B. 
C. 
D. 
Fifty percent of students enrolled in an astronomy class have previously taken physics. Thirty percent of these students received an A for the astronomy class, whereas twenty percent of the other students received an A for astronomy.Find the probability that a student selected at random received an A in the astronomy course.
A. 0.50 B. 0.10 C. 0.45 D. 0.25 E. none of these