past simple or present perfect?

She has studied marketing in college and has found a job.

If you are at an interview and what happened in the past is important now.

AnonymousWhich one do we use?

I would use the simple past to tell the story.

She studied marketing in college, then found a job.
___


To describe her to someone, in terms of her interests, for example, I would say

She has studied marketing in college.

I lost my keys.

Native speakers tend to use simple past in cases like the one above even though a result can be seen in the present. Why is that? I was told that native speakers didn't take such facts into account when speaking. Is that true? I do, sometimes. Shouldn't I?

A person who has lost his keys may announce it as 'cold' news to disinterested parties: I lost my keys.
Or he may explain his wandering through a restaurant, looking all over the floor and examining the tables, with: I've lost my keys.

— What happened today?
— For one thing, I lost my keys.

— Why in the world are you searching all over thi