Determine the standard equation of the ellipse described.Center at (-4, 5); focus at (-6, 5); ellipse passes through the point (-7, 5).
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
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Find the derivative of the function at P0 in the direction of u.f(x, y, z) = ln(x2 + 2y2 + 8z2), P0(2, 2, 2), u = 3i + 4j
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation.11 tons 500 lb ÷ 5
A. 3 tons 100 lb B. 2 tons 500 lb C. 2 tons 100 lb D. 2 tons 101 lb
Mathematics
Solve the problem.The number of bacteria growing in an incubation culture increases with time according to 
where t is time in days. After how many days will the number of bacteria in the culture be 1,625,000?
A. 1 day B. 4 days C. 6 days D. 10 days
Mathematics
Graph the ellipse.81x2 + 16y2 = 1296
A. 
B. 
C. 
D. 
Mathematics