Solve the problem.The volume V of a gas at constant temperature varies inversely as the pressure P on it. The volume of a gas is 
under a pressure of 
What will be its volume under a pressure of 30 kg/cm2? [Assume that the temperature remains constant].
A. 120 cm3
B. 257 cm3
C. 270 cm3
D. 126 cm3
Answer: A
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Find RT if R1 = 56 Kê, R2 = 27 Kê, and R3 = 12 Kê.
a. 47.5 Kê
b. 68 Kê
c. 83 Kê
d. 95 Kê
e. 107 Kê
Solve by completing the square.x2 + 8x = 7
A. 4 + 
B. -4 ± 2
C. -1 ± 
D. -4 ± 
Solve the problem.The weekly sales in thousands of items of a product has a seasonal sales record approximated by 
(t is time in weeks with 
referring to the first week in the year). During which week(s) will the sales equal 85,380 items?
A. week 4, week 20, and week 52 B. week 4 and week 47 C. week 21 and week 30 D. week 30 and week 47
Solve the problem.A bookstore is having a sale. All books included in the sale have a colored sticker on them to indicate the sale price. There are green stickers, red stickers, and orange stickers. Bob, Sue, and Fred each make purchases of books that are on sale. Each row of the table gives information about the numbers of book purchases and the total cost of the purchase (before taxes) . 
Use this information to set up a matrix equation of the form 
which can be solved to determine the price for each type of sale book. Solve this matrix equation to find the price
of a book with a green sticker.Use the fact that for A = 
, A-1 = 
.
A. $4.99
B. $4.89
C. $4.91
D. $4.96