Let 
. Compute the following.
?
, 
?
A. 
B. 
C. 
D. 
Answer: D
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = cos-1
A. ?
B. 
C. 1
D. No limit
Solve the problem.In a certain coastal basin, the sea water contains 3.9 grams of salt per 1000 milliliters of water. How many grams of salt would be in 3 liters of the sea water?
A. 117 grams B. 0.117 grams C. 1170 grams D. 11.7 grams
Solve the exponential equation using the method of "relating the bases" by first rewriting the equation in the form 
2x = 
A. {-3}
B. 
C. {3}
D. 
Solve the problem.The altitude of a projectile in feet (neglecting air resistance) is given by 
where x is the horizontal distance covered in feet and v is the initial velocity of the projectile at an angle ? from the horizontal. Find the firing angle (in degrees) of a projectile fired at an initial velocity of 100 feet per second so that it strikes the ground 312.5 feet from the firing point.
A. 30° B. 45° C. 22.5° D. 50°