Solve the problem.The voltage E in an electrical circuit is given by E = 5.7 cos 40?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 20
B. 40
C. 
D. 
Answer: A
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Plot the point whose coordinates are given. If appropriate show the "box."(?, e, 
)
What will be an ideal response?
Evaluate the spherical coordinate integral.
A. 
?
B. 
?
C. 
?
D. 
?
Find the center, transverse axis, vertices, foci, and asymptotes of the hyperbola.(x - 3)2 - 25(y - 1)2 = 25
A. center at (3, 1)
transverse axis is parallel to y-axis
vertices at (3, -4) and (3, 6),
foci at (3, 1 - 
) and (3, 1 + 
),
asymptotes of y + 1 = - 5(x + 3) and y + 1 = 5(x + 3)
B. center at (3, 1)
transverse axis is parallel to x-axis
vertices at (-2, 1) and (8, 1)
foci at (3 - 
, 1) and (3 + 
, 1)
asymptotes of y - 1 = - 
(x - 3) and y - 1 = 
(x - 3)
C. center at (3, 1)
transverse axis is parallel to x-axis
vertices at (2, 1) and (4, 1)
foci at (3 - 
, 1) and (3 + 
, 1)
asymptotes of y - 1 = - 5(x - 3) and y - 1 = 5(x - 3)
D. center at (1, 3)
transverse axis is parallel to x-axis
vertices at (-4, 3) and (6, 3)
foci at (1 - 
, 3) and (1 + 
, 3)
asymptotes of y - 3 = - 
(x - 1) and y - 3 = 
(x - 1)
Write the expression as the sum or difference of logarithms.log8 
A. log8 9 - log8 8 B. log8 9 + log8 8 C. log4 9 - log4 8 D. log8 8 - log8 9