Julie borrow $3500 for 3 years at 7 1/2% simple interest rate. How much interest is that?

Can somebody me out with this question

In a sample of 200 residents of georgetown county, 120 reported they believed the county real estate taxes were too high. develop a 95 percent confidence interval for the proportion of residents who believe the tax rate is too high. (round your answers to 3 decimal places.) confidence interval for the proportion of residents is up to . would it be reasonable to conclude that the majority of the taxpayers feel that the taxes are too high?

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years