Fireworks are fired from the roof of a 100 foot building and travel 84 feet per second. The equation h (t) = -16^2 +84t + 100 models the height (h) of the fireworks at any given time (t) seconds. How long are the fireworks in the air?

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