Wyatt wants to poll the opinion of a neighborhood about safety. Give an example of a biased sample?

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.