Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. 7 ln 
- 
ln 
- tan-1 x + C
B. ln 
+ 
ln 
+ tan-1 
+ C
C. 7 ln 
+ 
ln 
+ 
tan-1 
+ C
D. 7 ln 
+ 
ln 
+ sin-1 
+ C
Answer: C
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Simplify the rational expression. If the rational expression cannot be simplified, so state. 
A. cannot be simplified
B. -1
C. - 
D. 1
Write a matrix equation equivalent to the system of equations. 7x + 9y + 2z = 90 4x + 9y + 6z = 62 7x + 3y + 9z = 59
A.
| ? |
= 
B.
=
C.
= 
D.
=
?Approximate the definite integral "by hand," using the Trapezoidal Rule with 
trapezoids. Round answer to three decimal places.
?
A. ?13.716 B. ?23.708 C. ?11.854 D. ?17.145 E. ?18.966
Solve.A coil of wire rotating in a magnetic field induces a voltage given by 
where t is time in seconds. Find the smallest positive time to produce a voltage of 10
.
A. 3.33? sec B. 3 sec C. 3? sec D. 3.33 sec