Solve the problem. Round to the nearest tenth if necessary.The price of a printer was reduced from $400 to $240. What was the percent of decrease?
A. 60%
B. 40%
C. 45%
D. 66.7%
Answer: B
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Use implicit differentiation to find the specified derivative at the given point.Find 
at the point (3, 2, 2) for -8x2 - 5 ln xz + 8yz2 + 2ez = 0.
A. 
B. - 
C. 
D. 
Solve the problem using inductive reasoning.The following graph shows the average monthly cost for satellite television for each year from 2005 through 2012. Assuming the trend continues, use the graph to predict the average monthly cost for satellite TV in 2013.
A. $58 B. $68 C. $48 D. $42
Solve the problem.The cost to rent a power-wash machine from the hardware store depends on the number of hours the machine is rented. It costs $52 to rent the machine for 2 hours, and it costs $156 to rent it for 6 hours.(i) Write a linear equation giving the cost, y, in terms of the number of hours x.(ii) Use the equation found in part a to find how much it costs to rent for 12 hours.(iii) How many hours could you rent for a cost of $624?
A. (i) y = 26x (ii) $312 (iii) 24 hours B. (i) y = 25x (ii) $300 (iii) 23 hours C. (i) y = 28x (ii) $336 (iii) 24 hours D. (i) y = 27x (ii) $324 (iii) 25 hours
In the circuit below, Vin = 20 V, R = 12 Kê, and C = 0.003 æF. Find fCO.
a. 2.8 KHz
b. 4.4 KHz
c. 8.3 KHz
d. 14 KHz
e. 84 KHz