4.12 rounded to the nearest tenth is 4.1
D.) Nanometer is the smallest among your options.
It is equal to 10^-9
Hope this helps!
There are 3 lines of reflectional symmetry in an equilateral triangle
3x+1/2x+7x/x+5=
Answer is 17x^2+16x+5/2x^2+10x
Workup in photo below
