Solve the problem.In order to purchase a home, a family borrows $45,000 at an annual interest rate of 9%, to be paid back over a 30 year period in equal monthly payments. What is their monthly payment?
A. $362.08
B. $377.64
C. $337.50
D. $11.25
Answer: A
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Find the indicated root of the given quadratic equation by finding x3 from Newton's method (choose x0 to be the midpoint of the given interval).7x2 + 5x - 3 = 0 (between -2 and -1)
A. -1.1028790 B. -1.1058005 C. -1.1028847 D. -1.1034699
Rotate the axes so that the new equation contains no xy-term. Discuss the new equation.31x2 + 10
xy + 21y2 -144 = 0
A. ? = 45°
x'2 = -4
y'
parabola
vertex at (0, 0)
focus at (0, -
)
B. ? = 36.9°
+ 
= 1
ellipse
center at (0, 0)
major axis is x'-axis
vertices at (±3, 0)
C. ? = 45°
y'2 = -4
x'
parabola
vertex at (0, 0)
focus at (-
, 0)
D. ? = 30°
+ 
= 1
ellipse
center at (0, 0)
major axis is y'-axis
vertices at (0, ±3)
Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).-
- i
A. 
(cos 135° + i sin 135°)
B. 
(cos 45° + i sin 45°)
C. 
(cos 225° + i sin 225°)
D. 
(cos 315° + i sin 315°)
Evaluate the expression.
- 
A. - 
B. - 
C. 
D. 0