Solve the equation by the method of your choice.6x2 + 72x + 240 = 0
A. {-6 - 4i, -6 + 4i}
B. {-6 + 2i}
C. {-8, -4}
D. {-6 - 2i, -6 + 2i}
Answer: D
Mathematics
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Find the derivative of y with respect to the appropriate variable.y = (?2 + 5?) tanh-1 (? + 4)
A. (2? + 5) - 
B. - 
C. (2? + 5) tanh-1 (? + 4) - 
D. (2? + 5) tanh-1 (? + 4) - 
Mathematics
Find the moment or center of mass of the wire, as indicated.Find the moment about the y-axis of a wire of constant density that lies along the curve y = x2 from 
to
A. 
B. 
C. 
D. 2
Mathematics
Solve the problem.A loaf of bread is removed from an oven at 
and cooled in a room whose temperature is 
. If the bread cools to 
in 20 minutes, how much longer will it take the bread to cool to 
A. 18 min B. 6 min C. 26 min D. 7 min
Mathematics
Evaluate the expression.
?
?
A. 8 B. -9 C. -8 D. -16 E. 9
Mathematics