Zayn pour rice husks on the horizontal land at the rate of (13/90)π m³ per minute to form a conical pile of semi vertical angle 30°. i) Find the rate of change of the height of rice husks at the instant when t= 15 minutes.
ii) Find the rate of change of radius of the rice husk in terms of r​

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain