Find the center of mass of the particles with the given masses located at the given points.110 at (33.4, 0), 249 at (15.0, 0), 350 at (-11.6, 0), 422 at (-23.5, 0)
A. 
= 85.0, 
= 0
B. 
= -494, 
= 0
C. 
= 1.01, 
= 0
D. 
= -5.81, 
= 0
Answer: D
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Solve.The formula Z = R sec ? gives the impedance Z (in ohms) in an ac circuit with resistance R (in ohms) and phase angle ? (in radians). Find the average value of Z for an 88.9-? resistor as ? ranges from ?/8 radians to ?/3 radians.
A. 154.9 ? B. 124.1 ? C. 162.3 ? D. 81.2 ?
Solve the equation.6(2x - 1) = 24
A. 
B. 
C. 
D. 
Each day Larry needs at least 10 units of vitamin A, 12 units of vitamin B, and 20 units of vitamin C. Pill #1 contains 4 units of A and 3 of B. Pill #2 contains 1 unit of A, 2 of B, and 4 of C. Pill #3 contains 
of A, 1 of B, and 5 of C.Pill #1 costs 4 cents, pill #2 costs 3 cents, and pill #3 costs 
Larry wants to minimize cost. What are the coefficients of the objective function?
A. 4, 1, 10 B. 10, 12, 20 C. 4, 3, 9 D. 4, 4, 3
Solve.26 ? y = 7.8
A. 0.30 B. 18.2 C. 3 D. 0.03