an onion cell is 2 micrometers long. how many are needed to line up end to end across a microscope slide 8 centimeters long?

Question

it’s biology and i’m struggling pls help

Answer 1

1 meter = 1,000,000 μm

 

2 μm = (2μm)(1 m / 1000000 μm)(100 cm / 1 m)

 

         = 0.0002 cm

 

number of cells needed = (8 cm) ÷ (0.0002 cm / cell) = 40,000 cells