The value of \(2\pi \sqrt {\dfrac{l}{g}} \) when \(L= 4.8\) and \(g = 9.8\) is?

The value of \(\dfrac{{3xy}}{{{z^2}}}\) ,given that \(x = 9,y =-2\) and \(z = 5\) is ?

For  \(m =- 3\)  and \(n = 2\), find the value of \( - 2{m^2} + 3n\).

For \(x =5.4\)  and \(y = 3.2\), find the value, correct to two decimal places, of ,\(\sqrt {\dfrac{{x + y}}{{x - y}}} \),.

Evaluate \(2a-b\), given that \(a=5\) and \(b=2\)

Evaluate \(3a^2-5b\), given that \(a=5\) and \(b=2\)

Evaluate \(\sqrt{2a+3b}\), given that \(a=5\) and \(b=2\)

Evaluate \(2a^2-5b^3-4c\), given that \(a=5,\,b=2\) and \(c=-3\)

The value of \(\sqrt {{u^2} + 2as} \)  when \(u = 4, a = 5\) and  \(s = 10\) is ?

The value of \(2\pi \sqrt {\dfrac{l}{g}} \) when \(l = 3.2\) and \(g = 9.8\)  is?

The value of \(\dfrac{2}{3}{m^2}n\) , given that \(m = 5\) and \(n = 6\)  is ?