Determine if the relation is a function. Assume x is the independent variable.
+ x = 9
A. Yes
B. No
Answer: B
Mathematics
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Find the indicated derivative. Assume that x is restricted so that ln is defined.f' 
if f(x) = -ln(cos x)
A. 1
B. - 
C. - 
D. 
Mathematics
Perform the indicated operation. Write the answer in scientific notation.
A. 3 × 1013 B. 3 × 101 C. 6 × 1013 D. 6 × 101
Mathematics
Find a rectangular equation for the plane curve defined by the parametric equations.x = 6 sin t, y = 6 cos t; 0 ? t ? 2?
A. x2 + y2 = 36; for x in -6 ? x ? 6
B. y2 - x2 = 36; for x in -? < x < ?
C. y = x2 - 9; for x in -2 ? x ? 2
D. y = 
= 36; for x in -? < x < ?
Mathematics
Solve the problem.How long will it take for the population of a certain country to double if its annual growth rate is 
? Round to the nearest year.
A. 28 yr B. 80 yr C. 1 yr D. 12 yr
Mathematics