Find the indicated term of the binomial expansion.3rd term; (7x + 9)3
A. 3402x
B. 81
C. 1323x2
D. 1701x
Answer: D
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Use logax = (ln x)/(ln a) to calculate the logarithm. Round to the nearest ten thousandth.log? 600
A. 5.5882 B. 2.0362 C. 524.1415 D. 0.1789
Find an equation of a parabola satisfying the given conditions.Focus at (2, 6), directrix x = -4
A. (x - 2)2 = 12(y - 6) B. (x - 6)2 = 12(y + 1) C. (y - 6)2 = 12(x + 1) D. (y - 6)2 = 12(x - 2)
Solve the problem.Under certain conditions the x- and y- components of a magnetic file B area given by the equations
,where k is a constant. Write these equations in terms of polar coordinates.
A. Bx = k sin2 ?, By = -k cos2 ?
B. Bx = 
, By = - 
C. Bx = k cos2 ?, By = -k sin2 ?
D. Bx = 
, By = 
Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 