I need help with the questions could someone answer them all?

circumference= 40.82 cm

Step-by-step explanation:

formula circumference= 2 x pi x radius ( 2 x 3.14x 6.5)

3) shaded region =  area circle - area rectangle = 132.665 cm - 60 cm^2= 72.665 cm^2

4) 1 foot = 30.48 cm,  6 feet = 182.88 cm  = radius 182.88 cm  area circle =  pi x square radius  = 3.14 x  182.88 ^2  >  3.14 x 33445.0944  =105017.5964 cm^2  

if 5.49 = 70%   , 100% = x     so 5.49 x 100 divided 70 = X  so X = 7.844      then 5.49 is the 70 % of 7.844

if 6.99 is 36% of something,  6.99   =      36%

                                                     X    =    100%    

                                               so 6.99 x 100 = X (equis) x 36%

6.99 x 100 / 36 = X, so X = 19.416   .    6.99 is the 36% of 19.416

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