Solve the problem.Given the revenue and cost functions R = 28x - 0.3x2 and 
, where x is the daily production, find the rate of change of profit with respect to time when 20 units are produced and the rate of change of production is 5 units per day.
A. $80.00 per day
B. $55.00 per day
C. $103.00 per day
D. $112.00 per day
Answer: B
Mathematics
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Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 9, 
= 15, ? = 66°
Find the angle between v + w and w
A. 42.2° B. 36.0° C. 23.8° D. 78.2°
Mathematics
Solve the equation and check your solution.-6 = 8x - 5x
A. x = -2
B. x = 2
C. x = 
D. x = - 
Mathematics
Let A, B, and C be the following matrices:A = 
B = 
C = 
State whether or not each of the following calculations is possible. If possible, perform the calculation.A + B
What will be an ideal response?
Mathematics
Find the eccentricity of the ellipse or hyperbola.x2 + 25y2 = 25
A. 
B. 2
C. 
D. 
Mathematics