Find the equation of the hyperbola satisfying the given conditions.Vertices at (±6, 0); foci at (±9, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: D
Mathematics
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Solve the problem.Find -x when x is -1.5731
A. -1.5731
B. 1.5731
C. 
D. 0
Mathematics
Provide an appropriate response.Explain what is wrong with the statement "The line has no slope."
What will be an ideal response?
Mathematics
Find the total differential of the function 
.
?
A. 
B. ?
C. ?
D. ?
E. ?
Mathematics
Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 4 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 16?t2 B. (A ? r)(t) = 16?2t C. (A ? r)(t) = 4?t2 D. (A ? r)(t) = 8?t2
Mathematics