Represent square root of 9.3 on the number line. (Hint use semi circle and do geometrically)

The term independent of $x$ in $\left(\sqrt{x} - \frac{2}{x}\right)^{18}$ is:

(B) ${ }^{18} C_{6} 2^{12}$

The derivation of $\sqrt{\frac{1 - \cos x}{1 + \cos x}}$ with respect to $x$ is:

• A) $\sec^2(\frac{x}{2})$

• B) $\frac{1}{2} \sec^2(\frac{x}{2})$

• C) $-\sec^2(\frac{x}{2})$

• D) $\sec^2(\frac{x}{2})$

Two Formula One cars in a race have the same mass, but their kinetic energies are different. The ratio of their kinetic energies is 1:16. What would be the corresponding ratio of their velocities?

A) $4:1$ B) $1:4$ C) $2:1$ D) $1:2$

The rms velocity at NTP of the species can be calculated from the expression:

A) $\sqrt{\frac{3P}{d}}$ B) $\sqrt{\frac{3PV}{M}}$ C) $\sqrt{\frac{3RT}{M}}$

D) All of the above

Find the area of a triangular field whose sides are 91 m, 98 m, and 105 m in length. Find the height corresponding to the longest side.