Find the volume of the described solid.The base of the solid is the disk x2 + y2 ? 9. The cross sections by planes perpendicular to the 
between 
and 
are isosceles right triangles with one leg in the disk.
A. 72
B. 90
C. 144
D. 18
Answer: A
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = ln(t3 - 5t2 + 4)i - 
j - 8cos(t)k
A. v(0) = - 
j
B. v(0) = 
i - 
j
C. v(0) = 
j
D. v(0) = 
i - 
j + 8k
Mathematics
Determine where the graph of the function 
is concave upward and where it is concave downward. Also, find all inflection points of the function.
Mathematics
Translate each graph to an inequality using the variable x.
A. x < -5.7 B. x ? -5.7 C. x ? -5.7 D. x > -5.7
Mathematics
Solve.A consumer wants to purchase 1.5 L of antibacterial liquid hand soap. The bottles on the store shelf hold 
and 
Which bottle comes closest to containing the desired quantity? 
A. 64 oz B. 16 oz C. 32 oz D. 48 oz
Mathematics