Sarah lives in a part of the country where there are droughts. Consequently, the water company increases the cost per ccf of water based on usage. The piecewise function shows the rate schedule.
If Sarah used 210 ccf of water last month, what was she charged?
A. $37.80
B. $38.80
C. $39.80
D. $47.00
Answer: C
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Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.
A. 1.56 × 10-2 B. 3.13 × 10-2 C. 6.25 × 10-3 D. 2.60 × 10-3
Solve the problem.A tank truck hauls oil in a 
horizontal right circular cylindrical tank. If the density of the oil is 
, how much fluid force does the oil exert on each end of the tank when the tank is half full?
A. 12,960 lb B. 4320 lb C. 8640 lb D. 19,440 lb
Find the extreme values of the function subject to the given constraint.
A. Maximum: 4 at 
minimum: -4 at 
B. Maximum: 18 at 
minimum: -18 at 
C. Maximum: 4 at 
minimum: -4 at 
D. Maximum: 18 at 
minimum: -18 at 
Minimize 
subject to the given constraints.
?
?
Separate the minimum value and the point with a comma. Enter the point using coordinate notation: (x, y).
What will be an ideal response?