Ms. Ng is in charge of the budget for Mathletes. Last year, we began the year with $608.48 in our bank account, but by the end of the year we owed $217.99. Create a number line to represent this scenario. Then, determine the rational number that can be used to describe the change in the bank account's balance. If YOU CAN GIVE EXPLANATION​

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.