Solve the problem.Anne and Nancy use a metal alloy that is 20% copper to make jewelry. How many ounces of a 14% alloy and a 24% alloy must be mixed to form 100 ounces of the desired alloy?
A. 30 at 14% and 70 at 24%
B. 60 at 14% and 40 at 24%
C. 40 at 14% and 60 at 24%
D. 70 at 14% and 30 at 24%
Answer: C
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Factor completely. If unfactorable, indicate that the polynomial is prime.125x2 - 200xy + 80y2
A. 5( x - 4y)(x + 4y ) B. 5(5x + 4y)2 C. 5(25x2 - 40xy + 16y2) D. 5(5x - 4y)2
Find the indicated quantity.Find the moment of inertia with respect to its axis of the solid generated by revolving the region bounded by 
and the 
about the x-axis, where k is the density.
A. 
?k
B. 
?k
C. 
?k
D. 
?k
Solve the problem.Joe has traveled 
of his total trip. He has traveled 864 miles so far. How many more miles does he have to travel?
A. none of these
B. 144 miles
C. 123
miles
D. 1008 miles
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
(log4 (r - 4) - log4 r)
A. log4 
B. log4 
C. log4 
D. log4 