The horizontal distance between the base of the ladder and the wall is: 11.8 foot
The mean is 9.6
3+8+10+12+15= 48/5= 9.6
The circle with center O has two chords AC and EF which are of same length 9.07.
OD and OB are the two perpendiculars drawn from the center O to the two chords AC and EF .It represents the distance of the chords from the centre.
The circle theorem states: congruent chords are equidistant from the center.
OD is congruent to OB.
Option A is the right answer.
Answer:
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Answer is B
-0.6- (-0.4)= -0.6+0.4= -0.2
