Give the domain and range of the relation.
A. domain: {4, 8, 12}; range: {5, 7, 13}
B. None of these
C. domain: {4, 7, 12}; range: {5, 8, 13}
D. domain: {5, 8, 13}; range: {4, 7, 12}
Answer: C
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Even with most of the problem missing, it is possible to tell whether a suggested answer is reasonable. Determine whether the answer given is reasonable. If it is unreasonable, move the decimal point or insert a decimal point to make the answer reasonable.How tall is the child?35 inches
A. Reasonable B. Unreasonable, should be 3.5 inches C. Unreasonable, should be 350 inches D. Unreasonable, should be 0.35 inches
Divide. Assume all variables are nonzero.
A. 7x2y7 B. 7x3y7 C. 60x3y7 D. 7x3y6
Convert the rectangular equation to polar form. Assume a > 0, r > 1.
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A. 
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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.