Answer
$$8.5 \ ha.$$
Work Step by Step
To change $ m^2$ to $ha$, we divide by $10^4$. That is,
$$85,000\ m^2= \frac{85,000}{10^4} \ ha=8.5 \ ha.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 3 - Section 3.4 - Volume and Area - Exercise - Page 147: 47
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