Evaluate the expression, given x = -2, y = 3, and a = -4.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the velocity vector.r(t) = (4t2 + 16)i + 
j
A. v = (8t)i + 
j
B. v = (8t)i - 
j
C. v = 
i + (8t)j
D. v = (8)i + 
j
Mathematics
Simplify.
+ 
+ 
A. 
B. 
C. 
D. 
Mathematics
Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Mathematics
Write an equivalent expression using radical notation and, if possible, simplify.(16x)2/3
A. 2
B. 64
C. 8
D. 64
Mathematics