$5500 is invested in an account at interest rate r, compounded continuously. Find the time required for the amount to double. (Approximate the result to two decimal places.)
?
?
A. 13.84 yr
B. 10.84 yr
C. 12.84 yr
D. 11.84 yr
E. 14.84 yr
Answer: C
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Find the slope and the y-intercept of the line.3x + 7y = 27
A. Slope 
; y-intercept 
B. Slope - 
; y-intercept 
C. Slope 
; y-intercept 
D. Slope - 
; y-intercept 
Find the extreme values of the function subject to the given constraint.
A. Maximum: 9 at 
minimum: 3 at 
B. Maximum: 9 at 
minimum: 1 at 
C. Maximum: 6 at 
minimum: 3 at 
D. Maximum: 6 at 
minimum: -3 at 
Solve the problem.A comet follows the hyperbolic path described by 
where x and y are in millions of miles. If the sun is the focus of the path, how close to the sun is the vertex of the path?
A. 12 million mi B. 3.2 million mi C. 3.7 million mi D. 0.3 million mi
For the pair of functions, find the indicated domain.f(x) = x2 - 49, g(x) = 2x + 3Find the domain of g ? f.
A. 
? 
B. [7, ?)
C. (-7, 7)
D. (-?, ?)