Question

A plant is 20 inches tall. If the plant grows 2h inches each week for the next 4 weeks and h inches for each 2 weeks after that, which expression shows the height of the plant in inches after 6 weeks?

Answer 1

H = (20 + 9h) in

Explanation:

Let

H = height of the plant after 6 weeks

h0 = initial height

x = increment after 6 weeks

H = h0 + x

The plant grows 2h inches each week for 4 weeks

2h * 4 = 8h

h inches for each 2 weeks after that,

This means,

x = 8h + h = 9h

Then,

H = (20 + 9h) in