Help me please in the middle of my final exam

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!

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122