The circle in the figure has a radius of r and center at C. The distance from A to B is x.
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If 
and 
, find r.
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Apply the rules regarding the use of significant digits when determining your answer.
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__________
Fill in the blank(s) with the appropriate word(s).
14
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Solve the problem.Suppose that the function y = f(x) is increasing on the interval (4, 6). Over what interval is the graph of 
increasing?
A. (-4, -2) B. (32 , 48) C. (4, 6) D. (12, 14)
Solve.A hiking club is trying to construct a rope bridge across a canyon. A 6-foot construction pole held upright casts a 7-foot shadow. At the same time of day, a tree at the edge of the canyon cast a shadow that exactly covers the distance that is needed for the rope bridge. The tree is exactly 89 feet tall. How long should the rope bridge be? (Round to the nearest foot.)
A. 90 ft B. 623 ft C. 76 ft D. 104 ft
Solve the problem.Anne and Nancy use a metal alloy that is 19.2% copper to make jewelry. How many ounces of a 15% alloy must be mixed with a 24% alloy to form 150 ounces of the desired alloy?
A. 80 ounces B. 70 ounces C. 75 ounces D. 82 ounces
Find the exact value by using a sum or difference identity.sin (115°) cos (55°) - cos (115°) sin (55°)
A. 
B. 
C. 
D. 