Evaluate the expression.(27)- 7/3
A. - 2187
B. Not a real number
C. 
D. - 63
Answer: C
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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. 
= 
B. 
= 
C. 
= 
D. 
= 
Solve the problem.If f(x) is a differentiable function and f ' (c) = 0 at an interior point c of f's domain, and if 
for all x in the domain, must f have a local minimum at x = c? Explain.
What will be an ideal response?
Divide, if possible.-357 ÷ 51
A. -17 B. 17 C. 7 D. -7
Find the intercepts of the circle. Round to the nearest hundredth, when necessary.121x2 + 121y2 - 88x - 132y - 433 = 0
A. The x-intercept is x ? 41.2, and the y-intercept is y ? 40.4. B. The two x-intercepts are x ? 2.29 and x ? -1.56, and the two y-intercepts are y ? 2.51 and y ? -1.42. C. The two x-intercepts are x ? 4.22 and x ? -3.49, and the two y-intercepts are y ? 4.48 and y ? -3.39. D. There are no intercepts.