Yes yes you are totally right
I can't see an image but I'm guessing red, yellow, or orange.
So, the answer would be 20 cm
First you have to moles so multiply .0483L X .55M= .026565 Multiply moles by mole ratio which is 1/2, so the moles becomes .013283 now molarity=moles/volume; divide .013283/.015L=.885533M significant figures and you final answer is 0.89M
