Evaluate \(\left(\frac{81}{16}\right)^{\frac{-1}{4}}\times 2^{-1}\)
Rationalize \(\frac{2\sqrt{3} + \sqrt{5}}{\sqrt{5} - \sqrt{3}}\)
Express the product of 0.21 and 0.34 in standard form
In a survey of 50 newspaper readers, 40 read Champion and 30 read Guardian, how many read both papers?
Factorize completely \(\frac{x^{3} + 3x^{2} - 10x}{2x^{2} - 8}\)