A 6 A boy at X sees a tower YZ which is 24 m tall. X is 30 m
horizontally from Z, the base of the tower.
Calculate the angle of elevation of Y from X.
The boy then walks towards the tower to a point T where the
angle of elevation of Y from T is 52º.
b Calculate the distance XT.

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.