Convert. Round to the nearest tenth unless otherwise indicated.The temperature in Duluth was -13°F. What is this temperature in degrees Celsius?

A. 8.6°C
B. -7.2°C
C. -25.0°C
D. -23.4°C

Answer: C

Mathematics

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Solve the problem.The Redlich-Kwong equation provides an approximate model for the behavior of real gases. The equation is P(V, T) =  - , where P is pressure, V is volume, T is Kelvin temperature, and a,b , and R are constants. Find the partial derivative of the function with respect to each variable.

A. PV =  + ; PT =  - 
B. PV =  - ; PT =  + 
C. PV =  - ; PT =  + 
D. PV =  + ; PT = -  + 

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Mathematics

Find the value of the polynomial.2x5 - 3x4 + 4x3 - x2  when x = 2

A. 44 B. 39 C. 73 D. 40

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Mathematics

Write the expression as the sum or difference of single logarithms. log9

A. log9x ? log9y ÷ log914
B. log9xy - log914 
C. log9x + log9y - log914 
D. log9x + log9y - log914 

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Mathematics

Solve the problem.A building contractor finds that  can of pipe joint compound is needed to plumb each new home. How many homes can be plumbed with 12 cans of compound?

A. 12 homes
B. 60 homes
C. 15 homes
D. 2 homes

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Mathematics