Answer:
It took Peter 28 minutes and 10.82 seconds to finish the race.
Step-by-step explanation:
We have that:
[tex]t_{A}[/tex]: Antonio = 28 min + 11.00 s (1)
[tex]t_{J}[/tex]: Julio = A - 0.08 s (2)
[tex]t_{P}[/tex]: Pete = J - 0.1 s (3)
Then, the time at which Pete finished the race is:
[tex] t_{P} = t_{J} - 0.1 [/tex] (4)
By entering equations (1), (2), (3) into (4) we have:
[tex] t_{P} = (t_{A} - 0.08) - 0.1 [/tex]
[tex] t_{P} = 28 min + 11.00 s - 0.18 s = 28 min + 10.82 s [/tex]
Therefore, it took Peter 28 minutes and 10.82 seconds to finish the race.
I hope it helps you!