Question

a 85 acre (ac) wooded area outside of town was turned into a new ecological preserve.
use the facts to find the area of the ecological preserve in hectares (ha).

conversion facts for area
1 acre (ac) = 43,560 square feet ($ft^{2}$)
1 square mile ($mi^{2}$) = 640 acres (ac)
1 hectare (ha) $\approx$ 2.5 acres (ac)

note that $\approx$ means \is approximately equal to\.
for this problem, treat $\approx$ as if it were =.

$square$ ha

Explanation:

Step1: Identify conversion factor

1 hectare (ha) $\approx$ 2.5 acres (ac)

Step2: Set up conversion formula

$\text{Area (ha)} = \frac{\text{Area (ac)}}{2.5}$

Step3: Substitute and calculate

$\text{Area (ha)} = \frac{85}{2.5} = 34$

Answer:

34 ha