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28 September, 06:42

The height of a sunflower plant varies directly with its age. Once it has sprouted from the ground, when a sunflower is 2 week old, it is 38 centimeters tall. When it's 6 weeks old, it is 114 centimeters tall. How tall is a sunflower plant that is 3 1/2 weeks old?

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  1. 28 September, 07:50
    0
    Answer: 66.5cm

    Step-by-step explanation:

    2weeks--38 cm

    6weeks--114cm

    31/2weeks--X

    Using given information it is easy to calculate rate of sunflower grow.

    Use proportion

    2:6=38:114

    2:3.5=38:x

    2X=3.5*38

    X=3.5*38/2

    x=66.5cm
  2. 28 September, 09:34
    0
    66.5

    Step-by-step explanation:

    38/2 = 19

    114/6 = 19

    19 x 3.5 = 66.5
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