for the area of the smaller semicircles
area = 1/2 x 3.142 x 5 x 5
area = 39.275cm²
for the larger circle
area = 1/2 x 3.142 x 10x 10
area= 157.1cm²
but since part of it is out and is replaced again
..total area of shaded part is 157.1cm² + 39.275cm² - 39.275cm²
area =157.1cm²
Answer:
Where: 28 is the old value in 36 is the new value in this case we have a positive change increase of 28.571142857
the answer is 3^5 because multiplication is done by adding the carriers
