Find an equation for the tangent to the curve at the given point.f(x) = 4
- x + 5, (16, 5)
A. y = - 
x + 5
B. y = - 
x + 13
C. y = 
x - 13
D. y = 5
Answer: B
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Solve the problem.Obtain the first nonzero term of the Maclaurin series for sin-1 x - tan-1 x.
A. 
B. 
C. - 
D. 
Give the meaning of the metric prefix.hecto
A. Hundred B. Thousand C. Hundredth D. Ten
Write the given terms as like radicals, if possible. If any variables exist, assume that they are positive.
, 
A. 4x
, 4y
B. x
, y
C. xy
, y2
D. Not possible
With computer security always a hot-button issue, demand is growing for technology that authenticates and authorizes computer users. The following table gives the authentication software sales (in billions of dollars), including projections, from 1999 through 2004.
Year, x012345Sales, y2.42.93.74.55.26.1?
(Here, 
represents 1999.)Find an equation of the least-squares line for these data. Please round the coefficients in your equation to three decimal places. Use the result to estimate the sales for 2010, assuming the projection is accurate. Round your answer to three decimal places.
?
A. 
billion
B. 
billion
C. 
billion
D. 
billion