Introduction to Integrals

For this task you will need a scientific calculator (there's probably one available in the device you are reading this from!)

Compute the Riemann sum for $f(x)=e^{-x^2}$ , with $x \in [0.25, 0.75]$ and $n=10$, using the mid point of a given interval for $x_i$ (i.e. $x_i = \frac{a+b}{2}$ for a chunk $\Delta x$ in the interval $[a,b]$). Round to the nearest thousandth.