Indicate whether the statement is true always, sometimes, or never.The product of a pair of complex conjugates (with b ? 0) is the difference of the squares of the real and imaginary parts.
A. Sometimes
B. Always
C. Never
Answer: C
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Solve the problem.The intensity L(x) of light x ft beneath the surface of a lake satisfies the differential equation 
. At what depth, to the nearest foot, is the intensity one tenth the intensity at the surface?
A. 49 ft B. 22 ft C. 16 ft D. 33 ft
The functional notation 
means the function whose name is 
evaluated at 
style="vertical-align: middle;" />. Answer the following statement true (T) or false (F)
Solve the problem.The charcoal from a tree killed in a volcanic eruption contained 66.1% of the 
found in living matter. How old is the tree, to the nearest year? Use 
for the half-life of 
A. 5700 years B. 2360 years C. 1636 years D. 3404 years
Provide an appropriate response.Simplify: 
Fill in the blank(s) with the appropriate word(s).