Doughnuts are sold in bags or cartons. a bag holds 4 doughnuts and a carton holds 10 doughnuts. tom buys b bags of doughnuts and c carton of doughnuts . he buys a total of t doughnuts. write down a formula for t in terms of b and c. could someone me with the formula, i'm not the smartest when it comes down to maths.

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