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Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

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Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6