Let and be the propositions "I exercise" and " I feel tired", respectively. Then we want to know what is the negation of . Remember that, due to De Morgan's laws, the negation of is , that is "I don't exercise or I feel envigorated".
In this sentence the I exercise and I feel tired you need to say in order tos ay the negation of this sentence would be:
I do not exercise nor feel tired, since there´s no option that says this, we can choose the one that says I don´t exercise, and envigorated is the opposite than tired, so the correct option would be I don´t exercise and I feel envigorated.
Step-by-step explanation: It’s out of 100 and you first got 80 and then you got 100. Since it’s out of 100 you could just subtract to numbers ex: 100-80=20. The answer is 20% increase