exam Maths Puzzle Numerical Ability

I am not sure if I am in the right area of algebra. I need to know about precision and accuracy.
Example what is the precision and accursay for the following measurements
0.0524c

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exam Other Question

the perimeter of a rectangle can be found by using the formula p= 2l+ 2w where l is the length and w is the width of a rectangle. what is the width of a rectangle with a perimeter of 50 meters and a length of 16 meters? Solve the following systems of linear inequalities by graphing.
x-2y>4
x<4

x-2y>4
-2y>-x+4
y>-1/2x+2

(0,1)(2,0)

I'm double checking to see if I did the first part ri