could someone help me with all f these.it's due today and I would really appriciate if you could help me :)

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

What is the binomial expansion of (2x-3)^5

Which of the following are accepted without proof in a logical system? check all that apply.