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.

8 0

3 years ago

Solve f(x) = 3(4)^x when x = 10. Can you explain how to solve this?

rusak2 [61]

$\bf f(x)=3(4)^x\qquad \boxed{x=10}\qquad f(x)=3(4)^{10}\implies f(x)=3\cdot 4^{10}
\\\\\\
f(x)=3\cdot 1048576\implies f(x)=3145728$

6 0

3 years ago

How do you find the range of (x^3+x^2-6x)/(4x^2+4x-8)

djyliett [7]

Answer:

this question is some one tough but I will try it

7 0

3 years ago