Determine whether the proportion is true or false.
= 
A. True
B. False
Answer: B
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Use identities to simplify the expression.
A. cos2 x B. sin2 x C. tan x sec x D. cot x csc x
Solve.In order for a chemical reaction to remain stable, its Celsius temperature, C, must be no more than 77.48° C. At what Fahrenheit temperatures, F, will the reaction remain stable. 
Round to the nearest hundredth of a degree, if necessary.
A. At temperatures less than or equal to 25.27° Fahrenheit B. At temperatures greater than or equal to 171.46° Fahrenheit C. At temperatures greater than or equal to 25.27° Fahrenheit D. At temperatures less than or equal to 171.46° Fahrenheit
Perform the conversion. Round to the nearest hundredth when necessary.77.4 in. to cm
A. 928.8 cm B. 196.60 cm C. 30.50 cm D. 6.42 cm
Factor completely, or state that the polynomial is prime.x8 - 1
A. (x4 - 1)2 B. (x4 + 1)(x2 + 1)(x + 1)(x - 1) C. prime D. (x2 - 1)4