Katelyn's older brother borrowed money for school. He took out a loan that charges 6% simple interest. He will end up paying 5720 in interest
after 6 years. How much did Katelyn's brother borrow for school?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.