Question

Isabella's family has a Christmas tree farm. After the winter break, they planted numerous small trees that were each about 350 mm tall. After five months, each tree grew to a height of at least 720 mm. What was the rate of growth per month?

A. x = 70 mm/month
B. x = 74 mm/month
C. x = 74 mm/week
D. x = 70 mm/week

Answer 1

The rate of growth per month for Isabella's Christmas trees is calculated by dividing the total growth in height (370 mm) by the number of months (5), resulting in 74 mm/month. The correct answer is B. x = 74 mm/month.

Step-by-step explanation:

To calculate the rate of growth per month for Isabella's Christmas trees, we can use the information given: the initial height of the trees was 350 mm, and after five months, they grew to at least 720 mm.

The growth in height over the five months is:

Final height - Initial height = 720 mm - 350 mm = 370 mm.

To find the monthly growth rate, we divide the total growth by the number of months:

Monthly growth rate = Total growth ÷ Number of months = 370 mm ÷ 5 months = 74 mm/month.

Therefore, the correct answer is B. x = 74 mm/month.