Wgat am I supposed to do here

Use set buikder notation to represent the following set: {, -2, -1, 0}

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!