Solve the problem.Find out how long it takes a $2800 investment to double if it is invested at 
compounded quarterly. Round to the nearest tenth of a year. Use the formula 
.
A. 9 years
B. 9.2 years
C. 8.6 years
D. 8.8 years
Answer: D
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. -5x + 8y + 4z = 7 B. -5x - 8y + 8z = 7 C. -5x - 8y + 8z = -5 D. -5x + 8y + 4z = -5
Solve the problem.How much work is required to move an object from x = 0 to x = 5 (measured in meters) in the presence of a constant force of 10 N acting along the x-axis?
A. 2 J B. 125 J C. ? D. 50 J
Solve the problem.Write an iterated triple integral in the order 
for the volume of the tetrahedron cut from the first octant by the plane 
.
A. 
B. 
C. 
D. 
Solve.To trim the edges of a rectangular table cloth, 60 feet of lace are needed. The length of the table cloth is exactly one-half its width. What are the dimensions of the table cloth?
A. length: 20 ft; width: 40 ft B. length: 10 ft; width: 20 ft C. length: 5 ft; width: 10 ft D. length: 20 ft; width: 10 ft