Solve the problem.A rotating drill head is in the shape of a right circular cone Find the moment of inertia of the drill head with respect to its axis if its radius is 4.4 mm, its height is 7.8 mm, and its mass is 
A. 50 g?mm2
B. 47 g?mm2
C. 15 g?mm2
D. 3.4 g?mm2
Answer: C
Mathematics
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Simplify the expression. (Assume that r, s, and t are positive.)
?
?
A. 
B. 
C. 
D. ?
E. ?
Mathematics
Insert < or > to form a true statement.
A. > B. <
Mathematics
Solve the problem.To obtain a certain shade of paint, Peter mixed 
of white paint with 
of brown and 
of blue paint. How much paint did he have?
A. 7
gal
B. 
gal
C. 
gal
D. 2
gal
Mathematics
Find the cross-product and determine whether the proportion is true or false.
= 
A. 72 = 72; true B. 8 ? 162; false C. 18 ? 72; false D. 36 = 36; true
Mathematics