Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 20, whole = 8
A. percent = 250%
B. percent = 25%
C. percent = 125%
D. percent = 40%
Answer: A
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Use the sum/difference identities to simplify the expression. Do not use a calculator.cos 5° cos 40° - sin 5° sin 40°
A. 
B. 
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A. negative five hundred and sixteen and fifty-five thousandths B. negative five hundred sixteen and fifty-five thousandths C. negative five hundred sixteen and fifty-five ten-thousandths D. negative five hundred and sixteen and fifty-five hundredths