Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: "nose" of the paraboloid x2 + y2 = 2z cut by the plane z = 3Density: ? = 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If f(x) = (x - 3)2 , find all values of x for which f(x) = 16.
A. -1, 7 B. 4, -4 C. 19 D. -7, -1
Mathematics
Simplify the radical.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The temperature, t, in degrees Fahrenheit, of water 
65 + 
m where m is the number of minutes since heating began. How long will it take for the temperature of the water to reach 70 degrees Fahrenheit?
A. 20 min B. 4 min C. 7 min D. 10 min
Mathematics