Solve the problem.A new car was purchased for $14,400, and 3 years later it was worth $8700. Assume that the depreciation in value is given by a linear equation. Find the value of the car at the end of 4 years.
A. $5700
B. $12,500
C. $6800
D. $18,200
Answer: C
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Solve.The cost of renting a certain type of car is $45 per day plus $0.08 per mile. A linear function that expresses the cost C of renting a car for one day as a function of the number of miles driven x is 
How many miles were driven if the rental cost for one day is $65.00?
A. 288 miles B. 813 miles C. 236 miles D. 250 miles
Find an equation for the graph.
A. y = 3 sin 
x
B. y = 5 sin 3x
C. y = 3 sin 5x
D. y = 5 sin 
x
Find all the first order partial derivatives for the following function.f(x, y, z) = xz
A. 
= z
; 
= 
; 
= x
B. 
= z
; 
= 
; 
= x
C. 
= z
; 
= - 
; 
= x
D. 
= z
; 
= - 
; 
= x
Find the unit price.A 0.75-lb package of salami costs $2.61. Round to the nearest cent.
A. $3.48/lb B. $4.57/lb C. $2.61/lb D. $1.96/lb