Solve the problem.If 9-x = 
, what does 81x equal?
A. 3
B. 9
C. -9
D. 
Answer: B
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Solve the problem.The Ideal Gas Law states that the pressure P of a gas obeys the function 
where n is the number of particles in the sample, T is the Kelvin temperature of the gas, V is the volume of the gas in liters, and k is the constant 1.38 × 10-23. Does the pressure have a local minimum along the line 
If so, what is the value of the
minimum pressure? Give reasons for your answer. Fill in the blank(s) with the appropriate word(s).
Solve the problem.A private shipping company will accept a box for domestic shipment only if the sum of its length and girth (distance around) does not exceed 90 in. Suppose you want to mail a box with square sides so that its dimensions are 
and it's girth is 
What dimensions will give the box its largest volume?
A. 15 in. x 15 in. x 30 in. B. 30 in. x 15 in. x 30 in. C. 20 in. x 20 in. x 15 in. D. 15 in. x 15 in. x 75 in.
Provide an appropriate response.Use the following sets to give the elements in the set indicated: U = {1,2,3,4,5,6,7,8}, A = {2,4,6,8}, B = {1,2,3,4,5}. A ? B
A. {1,2,3,4,5,6,8} B. { } C. {2,4} D. {1,2,3,4,5,6,7,8}
Provide an appropriate response.Determine if the expression (-7)-5 is positive or negative.
A. Positive B. Negative