Arecipe called for 3 3/4 cups of flower. how much flower is needed to make 1/2 of the recipe?

3 3/4 cups of flower to make 1  recipe

3 3/4 cups of flower> 1  recipe
??? n flower > 1/2 recipe

cross multiplication

n = 1/2   x 3 3/4    / 1  = 1/2  x 15 /4  = 15/ 8  cups of flower = 1.875

note 3  3/4 =( 3 x 4)  +3 / 4 = 15 /4 

A= 16π cm2find radius then circumferencea=pir^216pi=pir^2divide pi16=r^2r=4circuumfrence=2pircircumfernce=2pi4c=8piok so the angle is 3pi radianscircle is 2piradians so  3pi/2pi=3/2arec leanth is 3/2 of circumfernce3/2 times 8pi=(24pi)/2=12pianswer is 12pi cm (unless i misread the question and the values given)