Question

At noon (12:00 p.m.), three girls began jogging from the 0 -mile mark of a trail. Each girl jogged at her own steady pace. Drag pieces of information to complete the table.

Answer 1

Cindy: 4mph
Taylin: 4m/30 min : 8 mph
Judy:5.5m/45min : 7mph

Answer 2

Answer: Cyndy: speed = 4mph;

Taylin:
`(distance)/(time) = (4)/((1)/(2) )`, speed = 8mph;

Judy:
`(distance)/(time) = (5(1)/(4) )/((3)/(4) )`, speed=7 mph;

Explanation: To complete the table, it has to be written the distance / time and the speed (unit rate) of each girl.

Cyndy:

For her, the first column is already given:

`(distance)/(time)` =
`(6)/(1(1)/(2) )`

Speed is the distance traveled divided by how much time it was needed to walk the distance:

speed =
`(6)/((3)/(2) )`

speed = 6.
`(2)/(3)`

speed = 4 miles per hour (mph)

Taylin:

`(distance)/(time) = (4)/((1)/(2) )`

speed = 4.2

speed = 8mph

Judy:

`(distance)/(time) = (5(1)/(4) )/((3)/(4) )`

speed =
`(5(1)/(4) )/((3)/(4) )`

speed =
`((21)/(4) )/((3)/(4) )`

speed =
`(21)/(4) . (4)/(3)`

speed = 7mph