Two persons are to run a race, but one can run 11 meters per second, whereas the other can run 5 meters per second. If the slower runner has a 72-meter head start, how long will it be before the faster runner catches the slower runner, if they begin at the same time?
?
A. 10.5 sec
B. 12 sec
C. 11.5 sec
D. 13 sec
E. 14.40 sec
Answer: B
Mathematics
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Find the volume of the indicated region.the tetrahedron bounded by the coordinate planes and the plane 
A. 16 B. 24 C. 8 D. 12
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
?V is the vertex angle of isosceles triangle ?RVT. Prove that if VS is the median to RT, then bisects ?RVT.
Mathematics
Decide whether the composite functions, f ? g and g ? f, are equal to x.f(x) = 
, g(x) = 3x + 4
A. No, yes B. No, no C. Yes, no D. Yes, yes
Mathematics