Using A Calculator

Question 1:

\sqrt{395.5}

19.887181801351

Question 2:

\sqrt[3]{579.1}

8.3352351215067

Question 3:

\frac{5.09 + 8.37}{5.96 - 2.87}

4.3559870550162

Question 4:

\frac{{4.4}^{2}}{\sqrt{{7.9}^{2} + {9.4}^{3}}}

0.64785987446973