Find the vertices and the foci of the given ellipse.
+ 
= 1
A. V: (0, -8), (0, 8);
F: (0, - 
) and (0, 
)
B. V: (0, 64), (49, 0);
F: (0, 8), (7, 0)
C. V: (-8, 0), (8, 0)
F: (- 
, 0), (
, 0)
D. V: (0, -64), (0, 64);
F: (0, -8), (0, 8)
Answer: A
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The price of a certain commodity in dollars per unit at time t (measured in weeks) is given by
?
.
?
What is the price of the commodity at t = 0?
?
$__________ / unit
?
How fast is the price of the commodity decreasing at t = 0?
?
$__________ / wk
?
Find the equilibrium price of the commodity. (Hint: It's given by 
. Also, use the fact that 
.)
?
$__________ / unit
What will be an ideal response?
Complete the trinomial so it is a perfect square.x2 + 14x + 
A. 7 B. 196 C. 49 D. 14
Solve the problem.A person burns 9.4 calories per minute while walking. One must burn about 3500 calories in order to lose 1 lb. How many pounds would the person lose by walking for 9 hours? Round to the nearest hundredth.
A. 14.50 lb B. 0.02 lb C. 1.02 lb D. 1.45 lb
Find the distance between P and Q and the coordinates of the midpoint of the segment joining P and Q.P(1, 2), Q(4, 5)
A. 6; 
B. 3
; 
C. 6; 
D. 3
; 