Add or subtract.
- 
A. 
B. 
C. 
D. 
Answer: A
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Find 
by using logarithmic differentiation.y = x(x + 7)2/3(x - 7)1/3
A. 
B. 
C. 
D. 
Find the nth term {an} of the geometric sequence. When given, r is the common ratio.2, 4, 8, 16, 32, ...
A. an = 2 ? 2n-1 B. an = a1 + 2n C. an = 2 ? 2n D. an = 2 ? 2n
Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set. x - y + 2z = 35x + z = 3 x + 5y + z = 18
A. {(3, 0, 3)} B. Cramer's rule does not apply since D = 0; ? C. {(0, 3, 3)} D. {(3, 3, 0)}
Suppose a toy wagon is pulled by exerting a force of 25 pounds on a handle that makes a 20° angle with the horizontal as shown in the figure below. Find the work done in pulling the wagon 50 feet. Round your answer to one decimal place.
?
?
A. 1,200.0 ft-lb B. 427.5 ft-lb C. 2,350.2 ft-lb D. 1,174.6 ft-lb E. 2,348.2 ft-lb