A ladder 22 feet long is leaning against a wall that is perpendicular to level ground. The bottom of the ladder is 7 feet from the base of the wall. If the top of the ladder slips down 3 feet, how many feet will the bottom of the ladder slip?
Pick one:
A) 12.86
B) 15
C) 18
D) 19
E) 25
22^2-7^2=435   it means that the height is equal to 20.85.   since the top of the ladder slips down 4 feet, then the height of the wall =20.85-3= 
<gadget id="calculator">20.85-3</gadget>
<output>17.85</output>
17.85   the bottom=sqrt(22^2-17.85^2)=sqrt(484-318.62)=12.86   ans is 12.86
<result>A</result>
A ladder 22 feet long is leaning against a wall that is perpendicular to level ground. The bottom of the ladder is 7 feet from the base of the wall. If the top of the ladder slips down 3 feet, how many feet will the bottom of the ladder slip?