Divide.-2.8 ÷ (-0.4)
A. 70
B. 0.7
C. -7
D. 7
Answer: D
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Use the information below to determine the indicated set. U = {x | x ? N and x ? 12} A = {x | x ? N and 6 < x < 12} B = {x | x ? N and x is even and x < 12}A ? B'
A. {1, 3, 5, 7, 8, 9, 10, 11, 12} B. {1, 3, 5, 12} C. {7, 9, 11, 12} D. {7, 9, 11}
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. 
= Qh - Qc
D. 
= 
Determine all solutions of the equation in radians.Find sin 
, given that sin x = 
and x terminates in 0 < x < 
.
A. 
B. 
C. 
D. 
Write an equation for the graph.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1