A steel railroad expands and contracts according to the formula ?l = l??T, where ?l is the change in length, ? is a constant called the coefficient of linear expansion, l is the original length, and ?T is the change in temperature. If a 10 ft steel rail is installed at 0 o F how many inches will it expand when the temperature raises to 180 o F? 
A. ?l = 0.01 in.
B. ?l = 0.54 in.
C. ?l = 0.14 in.
D. ?l = 0.24 in.
E. ?l = 2.14 in.
Answer: A
Mathematics
You might also like to view...
Provide an appropriate response.
= ? (percent)
A. 1.28
%
B. 0.77
%
C. 7.77
%
D. 77
%
E. none of the above
Mathematics
Plot the given point in the rectangular coordinate system.(-3, -1)
A. 
B. 
C. 
D. 
Mathematics
Match the equation to its graph.y = 5x - 3
A. 
B. 
C. 
D. 
Mathematics
If the following is a polynomial function, then state its degree and leading coefficient. If it is not, then state this fact.f(x) = 9x4 + 9x3 - 8x2 + 9
A. Degree: 4; leading coefficient: 9 B. Degree: 9; leading coefficient: -8 C. Degree: 3; leading coefficient: 9 D. Not a polynomial function.
Mathematics