Using A Calculator

Question 1:

\sqrt{858.5}

29.300170647967

Question 2:

\sqrt[5]{549.4}

3.5316506035534

Question 3:

\frac{1.28 + 4.12}{9.53 - 2.14}

0.73071718538566

Question 4:

\frac{7^{2}}{\sqrt{{7.5}^{3} + {2.7}^{2}}}

2.3652874737205