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

Mathematics

1 answer:

Ipatiy [6.2K]2 years ago

8 0

Answer:

78.5 m²

Step-by-step explanation:

The formula to find the area of a quarter of a circle: $\frac{1}{4} * \pi * r^{2}$ , where $r$ is the radius (diameter ÷ 2) and the $\pi$ is alterable.

1) Substitute the given values into the formula.

= $\frac{1}{4} * 3.14 * 10^{2}$

2) Solve it.

= $\frac{1}{4} * 314$

= 78.5

3) Round it off to the nearest tenth. In this case, it has already been rounded off.

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We take the derivate:
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Which implies the function is decreasing.

Another way to answer the problem (although less insightful) you can take any two real numbers $k$ and $q$ such that $k\ \textgreater \ q$ , then if $f(k)-f(q)\ \textgreater \ 0$ the function is increasing and if $f(k)-f(q)\ \textless \ 0$ the function is decreasing. You can verify the function is decreasing with any two numbers in the function's domain.