Which value would the the smallest? 0.02, 2.4%, 1/4

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!

What is the absolute value of the complex number -4-sqrt2i

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?