Plss help me and don't answer if you don't help and I will report you so don't play games

Acircle has a circumference of 28.36 units what is the diameter of the circle

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

The correlation coefficient between the number of students and marks obtained in end semester exam. (13 marks) give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 marks) draw the number of students and marks obtained in end semester exam scatter diagram c. (4 marks) check list write your name and id corectly write the question number properly use your own calculator. show all the steps to solve the problems. use the correct formula. answer in provided time. don't use your mobile for any purpose. write your answer up to two decimal places