I will upvote and give brainliest answer

0<x<8.7

Step-by-step explanation:

for it to be a triangle, sum of two sides must be greater than the largest side.

so, if x is 8.4 or greater, it can't be a triangle since it is greater than the sum of 3.2 and 5.5

a side must be greater than 0

so , 0<x<8.7

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5