What irrational number is between 4.35 and 4.35? a. the square root or 17 b. the square root of 20 c. the square root of 23 d. the square root of 19

You do realise that 4.35 and 4.35 are exactly ther same number? however, √ 17 = 4.1234105626 so I think you are trying to tell us siomething. 
Dont know what the B aND  C's mean, maybe you could explain. the square root of 19 = 4.35 interestingly
 

Icant see the triangle to answer your question

Inversely proportional relationships mean that if one of the related things is multiplied in size by a number, x, then the other related thing is divided by x