Final answer:
The font size of a span element inside a paragraph set to .5em, within a div of 32px, is 8px.
Step-by-step explanation:
The font size of a element inside a paragraph () which is set to .5em will be calculated based on the font size of the paragraph itself. Given that the paragraph is .5em and it's within a
with a font-size of 32px, the actual font size of the paragraph is half of 32px, which equals 16px. As the
has a font-size of .5em, this will again be in relation to the paragraph; hence the font size of the element would also be half of the paragraph's font size, resulting in an 8px font.