Answer:
sum of the areas of their faces
Step-by-step explanation:
Lines f and g look to be parallel to each other.
The total R value is computed from the R-values of the components in the stack as ...
(inches of wood)*(R-value of wood) +(inches of fiberglass)*(R-value of fiberglass) +(inches of foam)*(R-value of foam)
= (4 in)(2 /in) +(2 in)(4 /in) +(3 in)(5 /in)
= 8 +8 +15
= 31
The total R-value of the wall is 31.
Answer:
the answer is 45 Lol.Hope that helps