Solve.If 2 ft 5 in. of material is used to manufacture one scarf, how much material is needed for 7 scarves?
A. 20 ft 3 in.
B. 16 ft 11 in.
C. 14 ft 5 in.
D. 14 ft 7 in.
Answer: B
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Solve.Population of Four States from 1970 to 2010 
How much did the population of State B increase from 1970 to 1990?
A. 1,438,850 B. 381,218 C. 380,218 D. 1,437,850
Find the probability of drawing a club on one draw from a card deck. ?
A. 
B. ?
C. ?
D. ?
E. ?
Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 
Solve.Wind resistance or atmospheric drag tends to slow down moving objects. Atmospheric drag varies jointly as an object's surface area A and velocity v. If a car traveling at a speed of 40 mph with a surface area of 31 ft2 experiences a drag of 186 N (Newtons), how fast must a car with 41 ft2 of surface area travel in order to experience a drag force of 455.1 N?
A. 74 mph B. 76 mph C. 71 mph D. 79 mph