The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = sin-1(7t)i + ln(2t2 + 1)j + 
k
A. 
B. 
C. 
D. 0
Answer: C
Mathematics
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Find the indicated vector.Let u = 
, v = 
. Find 
u + 
v.
A. 
B. 
C. 
D. 
Mathematics
Solve.Annica owes $734.48 on her charge card. She returns for credit items costing $23.44 and $36.43. She makes a purchase for $26.51 and additional purchases of $40.26, $197.02, and $127.82. She then makes a payment of $747.45. Find the amount she now owes.
A. $1030.45 B. $438.51 C. $318.77 D. $1150.19
Mathematics
Solve.4y - 7 + y = -1 + 3y - 4y
A. {1}
B. 
C. 
D. 
Mathematics
Solve the problem.The graph of y = -6x + 7 is translated up 5 units. Determine the equation of the translated graph.
A. y = -30x + 12
B. y = 6x + 5
C. y = -6x + 12
D. y = 
x + 12
Mathematics