Height of a Plant

Question

The height of a plant is 21 inches. If its growth rate stays unchanged, it will be twice as tall after 3 years. What is the growth rate of the plant?

Answer 1

Hi Harrison, if the plant is 21 inches tall now and in 3 years it will be twice as tall, or 42 inches.

 

That means the plant grew 21 inches in 3 years. The growth rate is: 21 / 3, or 7 inches per year.

 

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