Find the derivative of the function at P0 in the direction of u.f(x, y, z) = -4xy3z2, P0(-4, -64, 16), u = -2i + j - 2k
A. - 
B. - 67,108,864
C. - 83,886,080
D. - 
Answer: A
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The region bounded by the parabola y = 81 - x2 and the x-axis, with density ?(x) = 9x2
A. 
= 
, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Mathematics
Convert the units.320 ft2 = 
yd2
A. 10 B. 4 C. 5 D. 35.6
Mathematics
Find the exact value of the expression using the provided information.Find tan(s + t) given that cos s = - 
, with s in quadrant II, and 
with t in 
A. 
B. - 
C. 
D. - 
Mathematics
Find ? if B = 4?.
?
?
Remember: The sum of the three angles in any triangle is always 180°.
?
A. ? = 72° B. ? = 19° C. ? = 21° D. ? = 18° E. ? = 69°
Mathematics