they use it to measure amounts of fluids and what not
Use a ruler.
They have to measure what paint to use and what size canvass
they have to measure how much cleaning ingredients to use
No devices use for measuring in math. In math we cannot measure we just calculate.
You use scrap pieces of drywall and joint compound.
PVA is not commonly used on drywall.
They measure how long and how wide
You use drywall primer first. After that you can use any normal paints.
Baking requires a lot of math. you need to use math when you measure. if you have to convert anything that requires math.