Find the equation for the level surface of the function through the given point.f(x, y, z) = 
+ 
, (4, e6, e-4)
A. -5e-4 - 5e6 + 3e4 + 1 = 
+ 
B. -4e-4 - 6e6 + 3e4 - 9 = 
+ 
C. -4e-4 - 6e6 + 3e4 + 1 = 
+ 
D. -4e-4 - 6e6 + 3e4 + 1 = ln ? + 1 + t et
Answer: C
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Evaluate the integral.
A. 
? cos 3
B. 
? cos 3
C. 
?2 cos 3
D. 
?2 cos 3
Rainbow Inc.'s sales equal $200,000 each month. Rainbow generally permits credit purchases with terms of 3/10 net 30. Ten (10) percent of total sales are for cash, and the remaining 90 percent pay on credit. Of the credit sales, 20 percent are paid on Day 10 of the billing cycle, and the rest pay on Day 30 (in the following month). What is the amount of the discounts that Rainbow's customers normally take?
A. $850 B. $720 C. $560 D. $485 E. $900
Solve the following system by any appropriate method. If there is no real number solution, so state.xy = 30x + y = -11
A. (5, -6), (6, -5) B. (-5, 6), (-6, 5) C. (5, 6), (6, 5) D. (-5, -6), (-6, -5)
Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.(243k5m-10)1/5
A. 3km2
B. 
C. 
D. 5km2