Factorise completely.
21a²+28ab

30 is 6 multiplied by a number y as a equation

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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!