Answer: 59.77 s
Step-by-step explanation:
We are told the total time for Ava [tex]t_{a}[/tex] is:
[tex]t_{a}=t_{a1}+t_{a2}[/tex]
Where [tex]t_{a1}=31.49 s[/tex] for the first lap and [tex]t_{a2}=30.03 s[/tex] for the second lap.
Hence:
[tex]t_{a}=31.49 s+30.03 s=61.52 s[/tex]
On the other hand, the total time for Jiao [tex]t_{j}[/tex] is:
[tex]t_{j}=t_{a}-1.75 s[/tex]
[tex]t_{j}=61.52 s-1.75 s[/tex]
Finally:
[tex]t_{j}=59.77 s[/tex] This is Jiao's total time
