Let $y=p(x)$ be the parabola passing through the points $(-1,0)$, $(0,1)$ and $(1,0)$. If the area of the region $\{(x,y):(x+1)^2+(y-1)^2\leq 1,\ y\leq p(x)\}$ is $A$, then $12(\pi-4A)$ is equal to ________.
Let the area of the region $\{(x,y): x-2y+4\ge0,\, x+2y^2\ge0,\, x+4y^2\le8,\, y\ge0\}$ be $\frac{m}{n}$, where $m$ and $n$ are coprime numbers. Then $m+n$ is equal to
A farmer $F_1$ has a land in the shape of a triangle with vertices at $P(0, 0)$, $Q(1, 1)$ and $R(2, 0)$. From this land, a neighbouring farmer $F_2$ takes away the region which lies between the line $PQ$ and a curve of the form $y = x^n$ $(n > 1)$. If the area of the region taken away by the farmer $F_2$ is exactly $30\%$ of the area of $\triangle PQR$, then the value of $n$ is
If the area of the region $\{(x,y):1-2x\leq y\leq4-x^2,\,x\geq0,\,y\geq0\}$ is $\dfrac{\alpha}{\beta}$, $\alpha,\beta\in\mathbf{N}$, $\gcd(\alpha,\beta)=1$, then the value of $(\alpha+\beta)$ is: