Solve the problem.Suppose f(x) = 33.4 + 1.2log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the depth (to the nearest tenth of a meter) where the salinity equals 35.
A. -1.0 g/kg
B. 22.5 g/kg
C. 20.5 g/kg
D. -0.9 g/kg
Answer: C
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Find parametric equations for the line described below.The line through the point P(-6, 5, 0) and perpendicular to the plane 
A. x = -2t - 6, y = -2t - 6, z = 0 B. x = 5t + 6, y = -2t - 5, z = -3t C. x = -5t + 6, y = 2t - 5, z = 3t D. x = -5t - 6, y = 2t + 5, z = 3t
Minimize 
subject to the given constraints.
?
?
A. 
B. 
C. 
D. 
E. none of these
Complete the identity.The expression 
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. tan x - sec x B. cot x + sin2x C. sin x + cos x D. cos x + 1
Write using radical notation. Then, simplify, if possible.(8y9)1/3
A. 2y9 B. 2y3 C. 8y3 D. Cannot be simplified