over seven days, a plant grew from 12 cm to 33 express its average growth rate in cm/day

33 - 12 = ?

Divide the difference by 7.

thanks

i got 3 cm

Right. The plant grew an average of 3 cm a day.

thank you so much

You're very welcome.

a plant grew from 12 cm to 33 cm.express its average growth rate in cm/day