Question

A plant is 6.2cm tall

the height of the plant increases by 11% each week
find how tall the plant will be after two weeks

Answer 1

7.64

Explanation:

1 week: (100% + 11%) × 6.2

111% × 6.2 = 6.882 cm

OR

11% × 6.2 = 0.682 cm

6.2 + 0.682 = 6.882 cm

Because the plant grows 11% additional to its original height.

1 week = 6.882 cm

2 weeks = 111% × 6.882 cm

OR

11% × 6.882cm = 0.75702 cm

0.75702 cm + 6.882 = 7.63902 cm

Because an additional 11% is added to what was grown in week 1.

=7.63902 cm

= 7.64 cm (rounded to 2 decimal places)

hope this helps!