Let D be the region lying above the x-axis, below the line y = x, outside of the circle x2 + y = 25, and inside the circle (x - 6)2 + y2 = 36. Then we can write By a2 + y dA = [ F(7, 8) der de, D a where F(r, 0) = a = b = and C d. Answer entry help: 1. a, b, c, d here may denote numbers, functions of 1 variable, or functions of 2 variables. 2. No blank spaces are allowed in the answer fields 3. If your answer a = Z please write only Z in the answer box. Note that a = is already written. Thus, if you put a = Z in the answer box, the system will read this as a = a = Z and will treat as a wrong answer. 4. Write theta for 0 Write v*z for v . z (multiplication of v by z ) Write tan(theta) for tan 0 (parenthesis are required) Write sqrt(z) for vz (parenthesis are required) Write viz for vz Write pi for TT Check