Multiply. Simplify, if possible.4
? 
A. 
B. 3
C. - 
D. 12
Answer: D
Mathematics
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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. 
= Qh - Qc
D. 
= 
Mathematics
Use a calculator to give the value to the nearest degree.? = tan-1(0.5774)
A. 32° B. 30° C. 60° D. 27°
Mathematics
Find the indicated term for the geometric sequence.2, -6, 18, ...; the 8th term
A. -2187 B. -4374 C. -39,366 D. 13,122
Mathematics
Solve the problem.The enrollment x at a community college this year was up 6% from the enrollment y last year. Write an inequality that compares the college's two enrollments.
A. x > y B. x < y
Mathematics