Solveit

Ok Melody thank you and CPhill ! You can put a check mark :)

$a^2+b^2=c^2$

5.6^2+3.58^2 = 44.1764

$c^2=44.1764$

$c= sqrt(44.1764) =6.6465329307842897$

it is an analog clock 

thanks CPhill and Guest !

i think:

 circumference(perimetr) of a circle is 2pi r

2r=diametr

so: 60pi*100=18849.5559215387594308

aprox. aswer: 18849.6

30                              

i accidentally paste the same photo it was a percent question: "I can t understood your percents :/"

thank you Omi67 and heureka !

i pastet the same photo excuse me heureka !

my mistake