Rationalise the denominator of  $\frac{5+\sqrt{3}}{5-\sqrt{3}}$

Express in scientific notation:  $9768854$

Express in scientific notation :  $0.04567891$

Express in scientific notation $72006865.48$

Write the following numbers in decimal form: $6.34\times {10}^4$

Write the following numbers in decimal form: $2.00367\times {10}^{-5}$

Write the following in scientific notation : ${\left(50000000\right)}^4$

Write the following in scientific notation :  ${\left(0.00000005\right)}^3$