Hat is the exact circumference of the circle? 10π ft 20π ft 40π ft 60π ft circle with center a and diameter of 20 feet labeled.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

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