One of the values r (radius), d (diameter), C (circumference), or A (area) is given for a particular circle. Find the indicated value. Leave ? in your answer.d = 60 ft; C = ?
A. 120? ft
B. 30 ft
C. 120 ft
D. 60? ft
Answer: D
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Solve the problem.A spherical water tank with an inner radius of 10 m has its lowest point 1 m above the ground. It is filled by a pipe that feeds the tank at its lowest point (see figure). Neglecting the volume of the inflow pipe, how much work is required to fill the tank if it is initially empty? Express the answer in terms of ?. 
A. 
? J
B. 
? J
C. 
? J
D. 
? J
Solve the problem.In a certain coastal basin, the sea water contains 3.2 grams of salt per 1000 milliliters of water. How many grams of salt would be in 5 liters of the sea water?
A. 0.16 grams B. 1600 grams C. 160 grams D. 16 grams
Perform the indicated operation and, if possible, simplify. Assume that all variables represent positive real numbers. (2 + 
)2
A. 7 + 4
B. 7 + 2
C. 5 + 4
D. 4 + 4
Use the Factor Theorem to determine whether x - c is a factor of f(x).f(x) = x4 + 6x3 + 4x2 + 22x - 12; x - 6
A. Yes B. No