A stone is dropped into a pond. Waves in the form of circles are generated and radius of outermost ripple increases at the rate of $5 \mathrm{~cm} / \mathrm{sec}$. Then area increased after 2 seconds is ............

If $f(x)=3 x-2$ and $g(x)=x^2$, then $(f \circ g)(x)=$

Which of the following is not equivalent to $p \rightarrow q$.

The value of $\int_{-3}^3\left(a x^5+b x^3+c x+k\right) d x$, where $a, b, c, k$ are constants, depends only on