Hello!
First, ≤ means "less than or equal to"
So the numbers that will make the inequality t≤7.4 are less than or equal to 7.4.
The numbers less than or equal to 7.4 are:
0, 4.7, 5.1, 7.4
Because
0 is less than 7.4
4.7 is less than 7.4
5.1 is less than 7.4
7.4 is equal to 7.4
Hence, we have
Hope everything is clear.
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