At twelve, Eric could run a 5 minute mile.

I'm not sure what you're asking, but if Eric can run 1 mile in 5 minutes, we can multiply this by twelve to find his MPH speed. This converting 1/5 to x/60 which would give us 12 MPH. If we hypothetically said that Eric could run one mile faster per year, that would explain that at age 12, Eric could run 12 miles :)

on my last

dickinson punctuation and lines in her poems to establish a rhythm. each reader will naturally find themselves reading the poem in the same way. she uses the repeating question marks and exclamation points to convey the passion in her words. shelley uses punctuation to paint a picture in the reader's mind. for example, the ellipses after "stand in the dessert" evoke a silence, as it would feel in a deserted, old place.