Thomas charged $2,400 on his credit card to buy furniture. the interest rate charged by the credit card company is 24.9%. how much will he pay in interest after one month?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.