Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Determine whether the function is a solution of the wave equation.w(x, t) = ln -6cxt
A. Yes B. No
Mathematics
Solve the problem.When $5600 is invested in a savings account paying simple interest for the year, the interest, i in dollars, can be obtained from the equation i = 5600r , where r is the rate of interest in decimal form. Graph i = 5600r , for r up to and including a rate of 16%. If the rate is 12%, how much interest is earned?
A. $692 B. $6720 C. $672 D. $656
Mathematics
Find the median for each data set.9, 35, 11, 29, 6, 41, 50
A. 35 B. 29 C. 26 D. 11
Mathematics
Name the quadrant in which the point is located.(-15, 2)
A. I B. II C. III D. IV
Mathematics