Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-9
+ 9
A. 18(cos 150° + i sin 150°)
B. 9(cos 210° + i sin 210°)
C. 9(cos 150° + i sin 150°)
D. 18(cos 210° + i sin 210°)
Answer: A
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Express the integrand as a sum of partial fractions and evaluate the integral.
A. 
+ 
ln 
+ C
B. 
+ 
ln 
+ C
C. 
+ 
ln 
+ C
D. 
+ 
ln 
+ C
Using a sum or difference identity, write the following as an expression involving functions of ?.tan (? + ?)
A. 
B. 
C. tan ?
D. -tan ?
Write the equation of the quadratic function whose graph is a parabola containing the given points.An egg is thrown upward from the top of a 128-foot-high building. The ball is 224 feet above ground level after 1 second, and it reaches ground level in 8 seconds. The height above the ground is a quadratic function of the time after the ball is thrown. Write the equation of this function.
A. y = -16x2 + 112x + 128 B. y = -16x2 + 56x + 128 C. y = -16x2 + 144x + 128 D. y = -16x2 + 16x + 128
Use the given graph to find the x-intercepts.
A. -2, 5 B. -5, 2 C. -5, -2 D. 2, 5