Please help it’s worth 4 points

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

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12