We are doing Simple interests Jessica took out an $84,000 loan to buy her grandmother a house. after 10 years she had paid $31,500 in interest. what was her interest rate?

Can someone me and do the problem plz so i can understand it more better

What is not true about kl and mn? what is mn? (show your work)

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%