Suppose one third of each of 5 same sized posters is covered with opaque paper.what fraction of the posters are not covered by opaque paper? explain how to use multiplication to find what part of the posters are not covered by opaque paper?

To find the amount of paper not covered by opaque paper, you will use the fraction that is NOT COVERED (1-1/3=2/3) and multiply it by the total number of pieces of paper.

2/3 x 5/1

This is 10/3, which is 3 1/3 of the total paper.

We have that
tan ∅=1.19
the value of the tan ∅ is positive
so
the angle ∅ belong to the I quadrant or III quadrant
∅=arc tan(1.19)>using a calculator>  ∅=49.96°
if angle ∅ belong to I quadrant
so
∅=49.96°

if angle ∅ belong to III quadrant
so
∅=180°+49.96°> ∅=229.96°   

convert degrees to radians
pi radians> 180°

∅=49.96°> 49.96°*pi/180°>0.87 radians> 1 radians
∅=229.96°   >229.96°*pi/180°>4.01 radians> 4 radians

the answer is
1 radians or 4 radians