Jenny and alyssa are members of the cross-country team. on a training run, jenny starts off and runs at a constant 3.8 m/s. alyssa starts 17 s later and runs at a constant 4.0 m/s.

It taken 323 sec by her to covers come jenny.

Explanation:

Given that,

Speed of Jenny = 3.8 m/s

Speed of Alyssa = 4.0 m/s

Suppose ,At what time after Jenny's start does Alyssa catch up with Jenny?

For Jenny,

Distance of Jenny = d

time of Jenny t'= t+17

Speed = 3.8 m/s

For Alyssa,

time = t

distance = d

Speed = 4 m/s

Distance covered by Jenny and Alyssa must be same.

We need to calculate the time

Using formula of distance

Hence, It taken 323 sec by her to covers come jenny.

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation: