Solve.
= -4
A. 96
B. ?
C. - 
D. 
Answer: B
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Graph the equation.9(x + 2)2 + 16(y - 1)2 = 144
A. 
B. 
C. 
D. 
The price of a certain commodity in dollars/unit at time 
(measured in weeks) is given by
?
?
What is the average price of the commodity over the 7-week period from 
to 
?
?
Round the answer to the nearest cent.
?
A. $10.14
B. $12.43
C. $6.81
D. $7.92
E. $4.15
Two chemical solutions, one containing N molecules of chemical A and another containing M molecules of chemical B, are mixed together at time t = 0. The molecules from the two chemicals combine to form another chemical solution containing y (AB) molecules. The rate at which the AB molecules are formed, 
, is called the reaction rate and is jointly proportional to
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. Thus,
?
?
where k is a constant (we assume the temperature of the chemical mixture remains constant during the interaction). Solve this differential equation with the side condition 
assuming that 
and 
.
?
Hint: Use the identity
?
What will be an ideal response?
Solve the problem.A rectangle has a diagonal of 17 feet and a perimeter of 46 feet. Find the rectangle's dimensions.
A. 8 ft by 15 ft B. 15 ft by 16 ft C. 8 ft by 30 ft D. 8 ft by 30 ft or 15 ft by 16 ft