Solve.Find the amount of discount when the original price is $143.90 and the discount rate is 30%.
A. $4.32
B. $139.58
C. $100.73
D. $43.17
Answer: D
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Write one or more inequalities that describe the set of points.The closed region bounded by the spheres of radius 9 and 10, both centered at the origin, and the planes 
and 
A. 81 ? x2 + y2 + z2 ? 100 and 1 ? x ? 9 B. 9 ? x2 + y2 + z2 ? 10 and x = 1 and x = 9 C. 9 < x2 + y2 + z2 < 10 and x = 1 and x = 9 D. 81 < x2 + y2 + z2 < 100 and 1 < x < 9
Provide an appropriate response.Convert 3 miles to feet using a conversion factor.
A. 5,280 feet B. 1,760 feet C. 15,840 feet D. 7,040 feet E. none of the above
Solve the inequality. Graph the solution set, and state the solution set in interval notation.|2k - 4| ? 7
A. 
B. 
C. 
? 
D. 
A tank initially contains 150 lb of salt dissolved in 400 gal of water. Saltwater containing 5 lb of salt per gal enters the tank at the rate of 5 gal per min. The mixture (kept uniform by stirring) is removed at the same rate. How many pounds of salt are in the tank after an hour?
What will be an ideal response?