8. In the circle shown below, chords PQ and RS intersect at point T such that ST = 7.29, RT = 3.07, and PT = 4.28. Which of the choices below would be closest to the length of QT ?
R
(1) 1.80
(2) 10.16
(3) 5.23
(4) 6.08

figure please

information is missing

1.3 million hoops i believe

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.