Calculate the shaded area. give your answer to 3 significant figures. include working out,

Only give 3/4 marks

A = π × r²

Area of the whole circle.

Area of a circle = pi*r^2

r = 6.5 cm  Note: this is 2 sig digs.

pi= 3.14

Area = 3.14 * 6.5^2

Area = 3.14 * 42.25

Area= 132.665

Area of unshaded smaller circle

pi = 3.14

r = 2.3

Area  = 3.14 * 2.3^2

Area = 3.14 * 5.29

Area = 16.61Area of the whole circle.

Area of a circle = pi*r^2

r = 6.5 cm  Note: this is 2 sig digs.

pi= 3.14

Area = 3.14 * 6.5^2

Area = 3.14 * 42.25

Area= 132.665

Area of unshaded smaller circle

pi = 3.14

r = 2.3

Area  = 3.14 * 2.3^2

Area = 3.14 * 5.29

Area = 16.61

A = 116.113 cm²

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: