Solve the problem.The fineness (purity) of gold is regulated by law and is the same in all parts of the world. The purity is stated in terms of karats. 18-kt gold is 18 parts gold and 6 parts alloy. Write this measure of purity as a fraction in lowest terms.
A. 
B. 
C. 
D. 3
Answer: A
Mathematics
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Find the linearization L(x) of the given function for the given value of a.f(x) = 
, a = 8
A. L(x) = 
+ 
B. L(x) = 
+ 
C. L(x) = 
+ 4
D. L(x) = 
+ 
Mathematics
Integrate the function.
A. 9 cos-1 
B. cos-1 
C. sin-1 
D. 
sin-1 
Mathematics
Solve the problem.The average daily temperature T of a city in the United States is approximated by T = 55 - 23 cos 
(t -30)where t is in days, 1 ? t ? 365, and t = 1 corresponds to January 1. Find the period of T.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find the sum Sn of the first n terms of the geometric sequence. 3, -9, 27, -81, 243, . . . ; n = 10
A. -44,279 B. -44,286 C. -44,292 D. -44,288
Mathematics