Chapter 14.2, Problem 68E

(a)

To determine

The interpretation of the integral ${\displaystyle \underset{R}{\iint }f\left(x,y\right)}dA$ for the function $f\left(x,y\right)$ which represents the total annual snowfall at the point $\left(x,y\right)$ in the county R.

(b)

To determine

The interpretation of the integral $\frac{{\displaystyle \underset{R}{\iint }f\left(x,y\right)}dA}{{\displaystyle \underset{R}{\iint }dA}}$ for the function $f\left(x,y\right)$ which represents the total annual snowfall at the point $\left(x,y\right)$ in the county R.