It is taller by 7 ft and 3 inches
You can first convert both values to inches and then subtract. Finally convert them back to ft and inches
A solid dot on the graph of an inequality indicates that the number is contained within the inequality, so yo should use

or

to represent that situation, whereas a white dot indicates that the number is not contained within the inequality.
Our graph is telling us that

is greater or equal than -1, and also

is less than 3. So our inequality will be:
85 is a composite number because it has more than two factors.
85 factors are 1, 5, 17, 85
For example 5 is prime because it’s factors are only two of them
5 factors are 1, 5