Solve the problem.A heat engine is a device that converts thermal energy into other forms. The thermal efficiency, e, of a heat engine is defined by 
where Qh is the heat absorbed in one cycle and Qc, the heat released into a reservoir in one cycle, is a constant. Find 
.
A. 
= Qh - Qc
B. 
= 
C. 
= 
D. 
= - 
Answer: C
Mathematics
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Name the conic or limiting form represented by the given equation.y2 - 4x + 2y + 17 = 0
A. Hyperbola B. Parabola C. Parallel lines D. Intersecting lines
Mathematics
Eliminate the parameter to find a Cartesian equation of the curve.  FIGURE 1.png)
What will be an ideal response?
Mathematics
Evaluate the expression.
A. 
B. 1
C. 4!
D. 4
Mathematics
Solve.A meteor circles the earth in an elliptical orbit. The major axis of the elliptical orbit is 24 × 108 miles long and the minor axis is 10 × 108 miles long. If the earth is at one focus of the orbit what is the distance from the other focus?
A. 2 × 
× 108 mi
B. 
× 104 mi
C. 2 × 
× 104 mi
D. 2 × 
× 103 mi
Mathematics