Mary Ball $400 for my bank for two years and was charged simple interest the total interest that she paid on the loan is $24 as a percentage what was the annual interest rate of her loan

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?