:DDD David took out a variable interest rate loan of $6860 at a simple interest rate of 6% per year for 5 years. After 1 year the annual interest rate raised to 7%. How much more interest will David pay than he was expecting? Show your work for me PLEASE

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.