Solve the problem.The decay of 416 mg of an isotope is given by 
where t is time in years since the initial amount of 416 mg was present. Find the amount left (to the nearest mg) after 60 years.
A. 402 mg
B. 56 mg
C. 29 mg
D. 57 mg
Answer: D
Mathematics
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Find the area of the surface generated by revolving the curve about the indicated axis. y = x3/14, 0 ? x ? 4; x-axis
A. 
?
B. 
?
C. 4528?
D. 
?
Mathematics
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = ln(t3 - 5t2 + 5)i - 
j - 2cos(t)k
A. v(0) = - 
j
B. v(0) = 
j
C. v(0) = 
i - 
j
D. v(0) = 
i - 
j + 2k
Mathematics
Find the transform of the given function of s.F 
= 
A. f 
= 2 sin 3t
B. f 
= sin 3t
C. f 
= cos 3t
D. f 
= 2 cos 3t
Mathematics
Find two possible missing terms so that the expression is a perfect square trinomial.x2 + 
+ 
A. - 
x, 
x
B. - 
x, 
x
C. -81x, 81x
D. -9x, 9x
Mathematics