Pls help! I don’t understand bc I’m not smart-

Answer:
78.5 m²
Step-by-step explanation:
The formula to find the area of a quarter of a circle: [tex]\frac{1}{4} * \pi * r^{2}[/tex], where [tex]r[/tex] is the radius (diameter ÷ 2) and the [tex]\pi[/tex] is alterable.
1) Substitute the given values into the formula.
= [tex]\frac{1}{4} * 3.14 * 10^{2}[/tex]
2) Solve it.
= [tex]\frac{1}{4} * 314[/tex]
= 78.5
3) Round it off to the nearest tenth. In this case, it has already been rounded off.