The Fundamental Theorem of Calculus is what officially shows how integrals and derivatives are linked to one another. The FTC is super important—dare we say integral—when learning about definite and indefinite integrals, so give it some love. It's also one of the theorems that pop up on exams. This decal sticker is made using high-quality vinyl, it is a cut out not a transparent printed sticker, and it comes ready to install with the transfer paper. Size is 6 inches in width and works great on computers laptops, walls or as a bumper sticker, just make sure to clean the surface and install carefully.