Does the right$-$endpoint approximation overestimate or underestimate the exact area?

$y=e^x$ over $0,1$

overestimate

underestimate

Calculate the right endpoint estimate, $R_{30}.($Round your answer to four decimal places.$)$

$R_{30}=$

$$

Solve for the exact area $($in units ${?}^2).$

$$ units ${?}^2$