Find the focus and directrix of the parabola.y2 = -28x
A. F: (-7, 0); D: y = 7
B. F: (7, 0); D: x = -7
C. F: (-7, 0); D: x = 7
D. F: (0, -7); D: y = 7
Answer: C
You might also like to view...
Solve the equation. Express radicals in simplest form.-4k2 - 2 = -18
A. {2} B. {-4, 4} C. {-9} D. {-2, 2}
Solve the problem.Consider a retirement savings account where the monthly contribution is $100 for the first 15 years, is increased to $225 for the next 15 years, and then is increased once again to $325 for the last 10 years. The APR is always 5.4% compounded monthly. What is the value of the account at the end of 40 years? Round your answer to the nearest cent.
A. $257,880.02 B. $255,975.42 C. $266,356.93 D. $281,406.16 E. $264,452.33
Match the function with its graph.1) y = sin 
x2) y = 
cos x3) y = 
sin x4) y = cos 
xA) B)
/> C) D)
A. 1A, 2D, 3C, 4B
B. 1A, 2C, 3D, 4B
C. 1B, 2D, 3C, 4A
D. 1A, 2B, 3C, 4D
Divide.
A. 4 + 
i
B. 
- 4i
C. -4 - 
i
D. - 
+ 4i