Follow the Rules for Working with Measurements $R$ Value of Insulation Is Given by the Formula

Multiple Choice

Follow the rules for working with measurements. The $R$ value of insulation is given by the formula $R = \frac { L } { K }$ , where L is the thickness of the insulating material and K is the thermal conductivity of the material. Find the R value of $18 \mathrm { in }$ of mineral wool insulation. K = 0.026. Note:L must be in feet.

A) $R = 5.6$
B) $R = 63$
C) $R = 59$
D) $R = 58$
E) $R = 57$