Solve the problem.Suppose f(x) = 32.6 + 1.3log (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. -0.9 g/kg
B. -1.0 g/kg
C. 71.2 g/kg
D. 69.2 g/kg
Answer: D
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Solve the problem.Suppose that the amount of oil pumped from a well decreases at the continuous rate of 
per year. When, to the nearest year, will the well's output fall to one-eighth of its present value?
A. 15 years B. 23 years C. 2 years D. 35 years
Solve the proportion.
= 
A. 28 B. 3.5 C. 14 D. 92.6
Write the phrase as a variable expression. Use x to represent "a number."A number divided by 60
A. 
B. 
C. x - 60
D. 60x
Solve the problem.To remodel a bathroom, a contractor charges $25 per hour plus material costs, which amount to $3500. Therefore, the total cost to remodel the bathroom is given by 
where x is the number of hours the contractor works. Find a formula for 
What does 
compute?
A. f -1(x) = 
- 3500; This computes the total cost if the contractor works x hours.
B. f -1(x) = 
- 140; This computes the total cost if the contractor works x hours.
C. f -1(x) = 
- 3500; This computes the number of hours worked if the total cost is x dollars.
D. f -1(x) = 
- 140; This computes the number of hours worked if the total cost is x dollars.