What is the area of the blue shaded region?

The outering is 11 cm so let's see what the Area is. We use the formula Area of a circle:

A = πr² = πd2/4

If:

Radius, r = 11 cm

Then:

Diameter, d = 22 cm

Circumference, C = 69.115038378975 cm

Area, A = 380.13271108436 cm²

now all we need to do is subtracts the inner circle Area.

If:

Radius, r = 9 cm

Then:

Diameter, d = 18 cm

Circumference, C = 56.548667764616 cm

Area, A = 254.46900494077 cm²

Thus: 380.13271108436 cm² - 254.46900494077 cm² =

125.6637061436 cm²

Step-by-step explanation:

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following