Use a table and/or a graph to decide whether the limit exists. If it exists, find its value.
f(x) , where f(x) = 
A. 16
B. 0
C. Does not exist
D. 15
Answer: D
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Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
- 4 ? x ? 4, about the x-axis (dimensions are in feet). If a cubic foot holds 7.481 gallons and the helicopter gets 3 miles to the gallon, how many additional miles will the helicopter be able to fly once the tank is installed (to the nearest mile)?
A. 150 B. 75 C. 301 D. 100
Solve the problem.Under standard conditions, molecules of a gas collide billions of times per second. If each molecule has diameter t, the average distance between collisions is given by 
where n, the volume density of the gas, is a constant. Find 
.
A. 
= - 
B. 
= - 
C. 
= 
D. 
= - 
Find the exact value of the indicated trigonometric function of ?.sec ? = 
, ? in quadrant IVFind tan ?.
A. - 
B. - 
C. - 
D. - 
Round the number as specified.2716.05 to the nearest thousand
A. 2700 B. 3000 C. 2720 D. 2716