Write an equation for the hyperbola.
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: C
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Use the Venn diagram below to find the number of elements in the region.
n(C - A)
A. 13 B. 11 C. 20 D. 15
Solve the problem.The volume V of a given mass of gas varies directly as the temperature T and inversely as the pressure P. If 
in.3 when 
and 
what is the volume when 
and 
(Round to the nearest tenth.)
A. 207.5 in3 B. 177.5 in3 C. 217.5 in3 D. 227.5 in3
Solve the problem.In a school survey, students showed these preferences for instructional materials. Answer the question. 
About how many students would you expect to prefer written materials in a school of 900 students?
A. About 162 students B. About 9 students C. About 81 students D. About 324 students
Round as indicated.459,729 to the nearest ten thousand
A. 500,000 B. 470,000 C. 450,000 D. 460,000