Evaluate -5.118 - (-4.1) explain this to me? every time i do it, i get it wrong.

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

What is 0.000008 meters in scientific notation

Find the value of the variable and the length of each chord for #5 and #6.