@Daniel Na https://www.wikihow.com/Calculate-Compound-Interest

And the cracks mostly follow the drywall seams from what I can see, which is typical....And as @Patricia Steiner said, it doesn't look like a pro installation....You could ask the Contr to use a flexible compound if this happens again, or maybe even now...https://www.dap.com/products-projects/product-categories/pat...Like everyone else said, I'd have it repaired - by a licensed Drywall Contr. - and then just check in on it.

Adding mass to the walls works wonders—attach Mass Loaded Vinyl (MLV) to the shared wall, then cover it with a layer of 5/8” drywall using Green Glue soundproofing compound for extra noise-blocking power.

I'm not sure if the contractors are trained to exacerbate every single problem or not.We recently discovered asbestos in the compound joint.

Tenant covenants and agrees to pay interest at the maximum lawful rate or eighteen percent (18%) interest, whichever is less, compounded annually, on all unpaid Rent, damages, and other amounts owed by Tenant, excluding late fees, from that date of Landlord’s final accounting until such time Tenant pays all such outstanding amounts.

So instead of waiting for the problem to compound until the lease is over, the plan is to replace the carpet immediately rather than try to muck with cat urine and get it 80% clean with various other solutions.

The difference between a 12% return and a 16% return compounded over 20 years will make you sick to your stomach. 

If we had hundreds of loans out, we’d have enough monthly income to aggregate the payments into additional loans—but we don’t.If you do this, your note will have to have a compounding clause in it, provided by your lending attorney.

Borrow the money interest free and compound on.

It could cause a low spot where things slow down and then it all compounds until there is a clog.