Circle A has a radius of (x+4) units. A large circle, B has ra dius of (x+5) units. use the formila A = π × r2 to write an expression for the difference in the areas of the circles. leave your answer in terms of PI. then use 3.14 for PI to approximate to the nearest whole number the difference in the areas when x=10
+129840 Circle A has a radius of (x+4) units. A large circle, B has ra dius of (x+5) units. use the formila A = π × r2 to write an expression for the difference in the areas of the circles. leave your answer in terms of PI. then use 3.14 for PI to approximate to the nearest whole number the difference in the areas when x=10
Area of circle B = pi * (x + 5) ^2
Area of coircle A = pi * ( x + 4)^2
Difference in areas = pi [ (x + 5)^2 - (x + 4)^2]
Difference in areas assuming pi = 3.14 and x = 10 =
3.14 [ (10 + 5)^2 - (10 + 4)^2] =
3.14 [ 15^2 - 14^2] =
3.14 {225 - 196] =
3.14 [ 29 ] ≈ 91.06 square units = 91 sqare units [to the nearest whole number]
