Find the mean. Round to the nearest tenth when necessary.The numbers of points Dee scored playing basketball over the last four games were as follows: 15, 9, 22, 15
A. Mean = 23.3 points
B. Mean = 15.8 points
C. Mean = 13.8 points
D. Mean = 15.3 points
Answer: D
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Solve.(11x - 7)2 = 12
A. x = ± 2
B. x = - 
, x = 
C. x = 
D. x = 
Find the standard form of the equation of the ellipse satisfying the given conditions.Center at (0, 0); Focus at (0, 6); Vertex at (0, 7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Find an equation of variation for the given situation.y varies directly as the square of x, and y = 4.95 when x = 3.
A. y = 0.6x2
B. y = 2.12x2
C. y = 0.59
D. y = 0.55x2
Solve the problem.Suppose that a hair dryer operates on a voltage that can be represented by the relation 
and that it draws a current represented by the relation 
where t is time measured in seconds. The power consumed by the appliance is P = VI. Graph the power in 
by 
and use an identity to write the expression for the power in the
form 
where a, k, and d are constants.
A. P = 400 cos(120?t) + 400
[0, 0.04, 0.01] by [-200, 2000, 200]
B. P = 800 cos(240?t) + 800
[0, 0.04, 0.01] by [-200, 2000, 200]
C. P = -400 cos(240?t) + 400
[0, 0.04, 0.01] by [-200, 2000, 200]
D. P = 400 cos(240?t) + 400
[0, 0.04, 0.01] by [-200, 2000, 200]