Of 38 cities, 7 have a lake and 21 have a river running through them. What fraction of these 38 cities have a lake or a river running through them? Show your work. Which expression can be used to find the fraction of cities that have a lake or a river running through them? Select the correct choice and fill in the answer box to complete your choice.

Is the square root of 4 plus the square root of 16 rational?

Need same math paper but the back now i hope your able to read it cleary i need with hw

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