so i need to find e missing side of each right triangle, side c is the hypotenuse!! a = 6.5m, b= 9m i have to round the answers to the nearest tenth if necessary

15. jiovanni is looking in to two different companies that offer study guides for math exams.test prep 101 charges a $5 flat fee and an additional $0.25 per problem.math charges a $2 flat fee and an additional $0.50 per problem.how many prablems would make the costs of the two companies be equal? varibles: equations/eniqualities{ {