Factor, if possible.49s2 - 4t4
A. (7s - 2t2)2
B. (7s + 2t2)2
C. Prime polynomial
D. (7s + 2t2)(7s - 2t2)
Answer: D
Mathematics
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Find the unit tangent vector of the given curve.r(t) = (3 + 2t3)i + (8 + 10t3)j + (6 + 11t3)k
A. T(t) = 
i + 
j + 
k
B. T(t) = 
i + 
j + 
k
C. T(t) = 
i + 2j + 
k
D. T(t) = 2i + 10j + 11k
Mathematics
Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = x2 + 4, y = 2x + 4
A. 
?
B. 
?
C. 8?
D. 
?
Mathematics
Solve the problem.Let f(x) = x1.78. Approximate f(2.4) to the nearest hundredth.
A. x ? 0.25 B. x ? 4.75 C. x ? 3.99 D. x ? 0.21
Mathematics
Add and simplify.
+ 
A. 
B. 
C. 
D. 
Mathematics