Please help The number of students in a chess club decreased from 39 to 13. What is the percent decrease? Round your answer to the nearest percent.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.