21 hundreds would be 2100
-2x·-2x·(-5x·-5x+4x·4x·4x) Basically, you write out the number depending on the exponent. So if you have a power/exponent of 3, you write it out multiplied by itself 3 times. Hope this helps!
The class 4S because you divide each number by its mean mark and standard division and 4S is the highest.
Which ever graph looks like this
The four sides to create the square
