The map below shows three metro lines, represented by solid lines. The metro stations are represented by points. Three metro stations are midpoints of metro lines. These merto stations are connected to each other by tram lines, which are represented by dashed lines. What are the coordinates of the merto stations?

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.