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. 
= 
Answer: C
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Perform the indicated operation. Write the answer in standard form.9i(2 - 8i)
A. 18i - 72i2 B. 72 + 18i C. 18i + 72i2 D. 18i - 72
Solve the problem using the idea of labeling.How many permutations are there of the letters in the word TENNESSEE?
A. 7560 B. 81 C. 362,880 D. 3780
Write a positive or negative integer that describes the situation.The submarine dove to a depth of 135 feet below the surface of the water.
A. -135 B. 135
Complete the following:(a) Use the Leading Coefficient Test to determine the graph's end behavior.(b) Find the x-intercepts. State whether the graph crosses the x-axis or touches the x-axis and turns around at each intercept.(c) Find the y-intercept.(d) Graph the function.f(x) = -2(x - 1)(x + 3)3
What will be an ideal response?