/sci/ - Science & Math

Retard here. Which term has a value of 2187 in the geometric series 1,3,9...?

In an arithmetic sequence, the 19th term is seven times the second term and the eight term is 53. Find A, the first term and D the distance between terms.

This one has me stumped guys someone please help please

I'm a second year physics student and desperately looking for a job, been applying to literally anything from supermarkets to mowing lawns.
Do you know if universities generally have anything they could hire me to do?
It doesn't have to be physics related, and it most likely won't be, since I suck. My university employs actual researchers, professors, students who do lab assistance work, summer jobs etc. but my grades are too shit to land a teaching job.

I'm going to contact my uni directly and ask for a job even if it was just washing the coffee mugs of actual physicist.
But it would greatly help me if I could point out something specific that I could do. Do you have any idea what it could be? Like, do the labs need people to sort out the equipment or anything like that? I'm basically looking for mindless manual labor but it would be great to get it straight from my campus.