What do i do with my rabbit when i'm in school?

I bought a little rabbit a couple of days ago she's about the size of an iphone 6 plus and i have school tomorrow from 6 am to 1 pm and i previously had a rabbit that died due to being alone because he was only one, so i'm scared she dies and i can't get another rabbit today maybe in a couple of days anyways i don't want to him to be sad when i'm in school or out or asleep, and i keep her in a small room so what should i put in the room?

Rabbits can't die of 'being alone', your rabbit likely died of starvation, illness, or thirst. Make sure before you leave you clean out the rabbit's cage of all waste, change it's water to be fresh, and give it some rabbit pellets and maybe a bit of greens. Make sure you are feeding the rabbit not just greens and carrots and give it mostly hay and rabbit pellet food. Make sure there's not fur in it's water and that you give it a bath every month or so. If you don't have a cage keep her in a small room and give her something comfortable to sit on. Purchase rabbit bedding and put it in a litter box or something, that's what I did with my rabbit. REMEMBER, give your rabbit LOTS of hay, that has to be most of what they eat.

If your rabbit is as small as you describe DO NOT give it any greens or carrots whatsoever. This can kill your rabbit by causing diarrhea, which is usually fatal for such young rabbits.

I don't know where you are getting your rabbits from, but it may be from someone being dishonest with you. A rabbit should be a minimum of 8 weeks of age before being removed from momma and from momma's milk. Bunny needs momma's antibodies for that long in order to be healthy. If your other bunny was too young, that would explain why it may have died.

The following link has photos of what bunnies look like at different ages in weeks. Take a look and see where you baby seems to fit size-wise. That way you can get a better idea of your bunny's age.
http://truluvrabbitry.com/2009/01/01/how-does-a-8-weeks-old-look-like/

In the meantime, do NOT get another baby rabbit. This isn't a good idea. Rabbits don't always get along (except when they are babies). But once they reach 3+ months, their hormones kick in and they often begin to fight. So unless you are prepared to spend a couple hundred dollars (or more) to have two rabbits spayed/neutered, then don't get a second rabbit. Two rabbits have to both be spayed/neutered in order for them to bond well.

If you get two rabbits now, they will likely get along ONLY until they are a few months of age. Then they will get aggressive towards each other and possibly towards you. Then you have to separate them -- two cages, two dishes, two everything. Then you have to pay for surgery costs. Then you have to let them heal. Then wait an additional 8 weeks after surgery. Then, finally, you can begin the bonding process. At that point they may bond, they may not.

The hours that you are at school are roughly when bunnies just snooze anyway. It isn't a problem for a bunny to be alone for that length of time.

If you'd like to see what you can add to a bunny's area, check my site:
http://rabbitsindoors.weebly.com

I'm most concerned about your new bunny's age. If this one is too young, it may be an uphill battle to keep her alive. The person who sold/gave you the bunny should have told you bunny's age. But they also may not be truthful. In many states, it is illegal to sell a baby before 8 weeks of age.

Your rabbit should be okay. Your previous rabbit, as you said was a year old; he should have been fine living on his own; so I'm guessing something else could have killed him. Rabbit's are highly capable of living by themselves. They don't need you 24/7 unless the rabbit has a medical condition. I have owned rabbits for almost 2 decades, and I have had bonded pairs, and ones that lived alone. They all lived healthy long lives. Your rabbit will be fine, there's nothing to worry about. Just make sure he/she has plenty of food and water.