Evaluate the expression for the given replacement values. Write the answer in simplest form.x ÷ y for x = - 
, y = 
A. - 
B. 
C. 
D. - 
Answer: D
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Find 
by using the Chain Rule. Express your final answer in terms of t.w = 
, x = 4t + 1, y = et, z = 6t - 1
A. 
B. 
C. 
D. 
Change the order of integration and evaluate the integral.
A. 3?2
B. 
?2
C. 
?2
D. 9?2
Solve the problem.A lumber yard has fixed costs of $7189.50 a day and variable costs of $1.00 per board-foot produced. The company gets $2.50 per board-foot sold. How many board-feet must be produced daily to break even (zero profit)?
A. 7189 board-feet B. 3195 board-feet C. 4793 board-feet D. 2054 board-feet
Solve the problem.To get a C in history, Nandan must have a mean score of 73 on four tests. Scores on the first three tests were 67, 77, and 60. What is the lowest score that Nandan can get on the last test and still receive a C?
A. 69 B. 15 C. 68 D. 88