Answer:
The "circle" you are referring to is only for inequality graphing.
A closed circle means that the "circle" is less than or greater than AND EQUAL TO wherever that point is on the graph.
A open circle means that the "circle" is less than or greater than wherever it is on the graph.
For your example,
X > 45 would be an open circle, because the alligator doesn't have an underline indicating it is also equal to 45.
The alligator indicates the direction and whether it also includes "equal to".
An example of a closed circle is this.
; the line below the alligator indicates that it is also equal to 45.
Alright, lets get started.
Sophie has 5 pieces of string that are 4 yards each.
1 yards = 3 feet,
So, 4 yards = feet
Total number of string she has = 5 piece
So, total length she has = feet
It means she had 60 feet string in starting.
Now, She uses 3 pieces that are each 3 feet long, means
She uses = feet
So, remaining string length will be = feet
Means 51 feet string does Sophie have. : Answer
Hope it will help :)