Amount of water Lynn's watering can can hold = 32 cups
As she fills it half full means she fills it with 32/2= 16 cups
Number of plants watered from 16 cups = 21 plants
As, each plant gets same amount of water, so each plant gets =
[tex]\frac{16}{21}[/tex] cups or 0.76 cups of water
Hence, each plant gets 0.76 cups of water.