If $f(x)=3x^{2}+15x+5$,then the approximate value of $f(3.02)$ is (in $.66$)

For a given function $y=f(x)$,$\delta y$ denotes the actual error in $y$ corresponding to an actual error $\delta x$ in $x$,and $dy$ denotes the approximate value of $\delta y$. If $y=f(x)=2x^2-3x+4$ and $\delta x=0.02$,then the value of $\delta y - dy$ when $x=5$ is

If $y=5x^2+6x+6$,$x=2$,and $\Delta x=0.001$,then the values of $\Delta y$ and $dy$ respectively are:

If the increase in the side of a square is $6 \%$,then the approximate percentage increase in its area is: (in $\%$)

The nearest approximate value of $\sqrt{2023}$ is

If $1^{\circ} = 0.0175 \text{ radians}$,then the approximate value of $\sec 58^{\circ}$ is