What is PLATO?
People keep saying it but I don't know what it is.

All I found other than the greek god dude is this, PLATO (Programmed Logic for Automatic Teaching Operations)was the first generalized computer-assisted instruction system.

Step-by-step explanation:

I hope you figure it out

b: |12 – x| ≤ 0.25

step-by-step explanation:      

let x be the possible lengths in inches, of the ribbons jaime cut.

we have been given that jaime is cutting strips of ribbon for a project. he tries to cut each piece to be 12 inches long, but sometimes he cuts it too long or too short by as much as 0.25 inch.  

we can represent this information in an inequality as:

by the definition of absolute value function we will get,

upon combining our inequalities we will get,

therefore, the inequality   describes all the possible lengths (x), in inches, of the ribbons jaime cut.

step-by-step explanation: