Please help me with science

The child with the trait is heterozygous.

Explanation:

It's a little difficult to be sure without wider context.  But my interpretation of both the graphic and the wording, is that the circle represents a person who has the trait, but not necessarily someone who expresses the trait.  The square, on the other hand, seems to represent a person who does not have the trait at all.

Based on that, the squares would be hom-zygous--they possess two copies of a dominant version of the characteristic.  And the circles would be heteroxygous--they possess two different versions, one recessive and one dominant.

Unfortunately, this is actually a poorly constructed question, and if the circles are intended to represent an individual who expresses the recessive trait, then the answer would be that the child is hom-zygous.  But based on the exact wording of the question, the correct interpretation of the graphic should be as I've explained above.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.