The eccentricity of the ellipse $\frac{x^2}{16} + \frac{y^2}{9} = 1$ is

The number of values of $x$ in the interval $[0, 3\pi]$ satisfying $2 \sin^2 x + 5 \sin x - 3 = 0$ is

Which of the following is not tetrahedral?

The ratio in which $\hat{i}+2 \hat{j}+3 \hat{k}$ divides the join of $-2 \hat{i}+3 \hat{j}+5 \hat{k}$ and $7 \hat{i}-\hat{k}$ is

What is the undifferentiated mass of cells in tissue culture called?

$A$ parachutist after bailing out falls $50\, m$ without friction. When the parachute opens,it decelerates at $2\, m/s^2$. He reaches the ground with a speed of $3\, m/s$. At what height did he bail out?