Factor the difference of squares.16x2 - 9
A. (4x - 3)2
B. (4x + 3)(4x - 3)
C. (4x + 3)2
D. (16x + 1)(x - 9)
Answer: B
Mathematics
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 1tk
A. a = 
N
B. a = 1
T
C. a = 1
N
D. a = T + 1
N
Mathematics
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 
for r(t) = 4sec2(t)i - 6tan(t)j + 9t2k
A. v
= -12j + 
?k
B. v
= 16i - 12j + 
?k
C. v
= 16i + 12j - 
?k
D. v
= -12j - 
?k
Mathematics
Provide an appropriate response. If distance = rate × time, how long did a trucker drive if she traveled 785.3 miles at 60 miles per hour?
A. 130.8 hours B. 7.6 hours C. 13.1 hours D. 6 hours
Mathematics
Evaluate the expression.
A. 2!
B. 
C. 6
D. 30
Mathematics