Question

Jessica can swim a lap and 29 and 2/5 second Marta can swim a lap in 28.7 seconds how much faster can marta swim lap and then Jessica

Answer 1

Alright, lets get started.

Jessica can swim a lap in
`29(2)/(5)` seconds

Converting it into decimals,
`29+(2)/(5)`

Means
`29+0.4 = 29.4` seconds

Means Jessica can swim a lap in 29.4 seconds

Marta can swim a lap in 28.7 seconds.

So, Martha is faster than Jessica by
`29.4-28.7=0.7` seconds

It means Marta is 0.7 seconds faster than Jessica. : Answer

Hope it will help :)