Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Answer: D
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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. 
= Qh - Qc
C. 
= 
D. 
= 
Provide an appropriate response.The given triangles are congruent with BC = EF. Write the corresponding part for ?B from triangle DEF. 
A. ?E B. ?A C. ?D D. ?F
Use identities to find the indicated value for each angle measure.cos 2? = - 
and 
< ? < ?
Find sin ?.
A. sin ? = 
B. sin ? = 
C. sin ? = 0
D. sin ? = - 
In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.a = 1 ft, c = 30 ft
A. b ? 31 ft B. b ? 30.0 ft C. b = 29 ft D. b ? 5.4 ft