The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 0 for r(t) = t2i + (7t3 - 8)j + 
k
A. a(0) = 2i - 
k
B. a(0) = 2i - 
k
C. a(0) = 2i - 
k
D. a(0) = 2i + 
k
Answer: C
Mathematics
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Convert as indicated.31 kl to liters
A. 0.31 L B. 31,000 L C. 3100 L D. 0.031 L
Mathematics
Determine whether f is a linear function. If f is linear, give the values for m and b so that f may be expressed as 
.f(x) = 
x - 3
A. Linear; m = - 
, b = 3
B. Linear; m = 6, b = 3
C. Linear; m = 
, b = -3
D. Nonlinear
Mathematics
Find the vertex and axis of symmetry of the graph of the function.f(x) = x2 + 1
A. vertex: (-1, 0); x = -1 B. vertex: (1, 0); x = 1 C. vertex: (0, 1); x = 0 D. vertex: (0, -1); x = 0
Mathematics
Determine the equation of the line described. Put answer in the slope-intercept form, if possible.Through (-2, -1), parallel to 9x + 4y = 6
A. y = 
x + 
B. y = 
x + 
C. y = - 
x - 
D. y = - 
x - 
Mathematics