For brainiest:):):):):):)
*easy*

im not sure exactly which one you wanted me to solve so... i'll solve both

so for 11. it would be 19 x 3.14 x 2 because its 2 semicircles and that equals 119.32

now for 12. it would just be 11 x 3.14 because its 1 semicircle. That equals 34.54

Step-by-step explanation:

so the answeers are 119.32 and 34.54

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.