For what? Like what lesson?
This is how to solve the problem:
We know that the growth rate is constant for both species of plants. So we can say that the height is a linear function of the number of days since d = 0.
Assumption (1 month = 30 days)
Species A:
Growth rate = 2 cm/month = 2/30 = 1/15 cm/day
Height on day d = 0: 12 cm
Height: H(d) = 12 + d/15
Species B:
Growth rate = 3 cm/month = 3/30 = 1/10 cm/day
Height on day d = 0: 10 cm
Height: H(d) = 10 + d/10
Answer:
No sugar.
Explanation:
When we want to refer to a plural noun or an uncountable noun, without giving a specific quantity, we use ‘some’ and ‘any’. We use ‘some’ in affirmatives and ‘any’ in questions and negatives.
In this situation, you're saying that you have no sugar when you say you don't have any sugar left.