Find the approximate value of $\sqrt{49.5}$.

If the percentage error in the radius of a circle is $3\%$,then the percentage error in its area is:

Find the approximate volume of metal in a hollow spherical shell whose internal and external radii are $3 \text{ cm}$ and $3.0005 \text{ cm}$,respectively.

Consider the following statements:
$A$ is the relative error in the area of a square when the relative error in its side is $0.4$.
$B$ is the relative error in the volume of a sphere when the relative error in its radius is $0.3$.
$C$ is the relative error in the surface area of a closed cylinder whose height is equal to its radius, when the relative error in its height is $0.2$.
$D$ is the approximate error in $y = x^2 + x - 3$ when $x = 2$ and $\delta x = 0.1$.
The ascending order of the values of errors in these statements is:

Find the approximate value of $f(2.01),$ where $f(x)=4x^{2}+5x+2$.

The approximate value of the function $f(x) = x^{3} + 5x^{2} - 7x + 10$ at $x = 1.1$ is (in $.6$)