Using A Calculator

Question 1:

\sqrt{4.341}

2.0835066594566

Question 2:

\sqrt[4]{3.124}

1.329467595552

Question 3:

\frac{2.75 + 6.88}{5.63 - 2.9}

3.5274725274725

Question 4:

\frac{{9.9}^{2}}{\sqrt{{1.1}^{2} + {6.5}^{2}}}

14.867074859038