The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (10 - 3t2)i + (6t + 9)j - e-4tk
A. v(4) = -24i + 6j + 4e-16k
B. v(4) = -12i +6j + 4e-16k
C. v(4) = -24i + 6j - 4e-16k
D. v(4) = 24i + 6j + 4e-16k
Answer: A
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Build up each of the fractions so that they have the given denominator.Fractions: 
and 
; Denominator: 40
A. 
and 
B. 
and 
C. 
and 
D. 
and 
Solve.Two swimmers are swimming in opposite directions. One is swimming at a speed of 2 m/sec. and the other is swimming at a speed of 2
m/sec. If we begin a stopwatch at the time that they pass each other, then how long will it take them to get 47 m apart?
A. 20
sec.
B. 11
sec.
C. 10
sec.
D. 9
sec.
Refer to the table to answer the question.
Which category and year shows the smallest absolute change?
A. Training '98-'99 B. Catalog, '98-'99 C. Sales, '99-'00 D. Catalog '99-'00
Graph the linear equation.-x = 7y + 3
A. 
B. 
C. 
D. 