The art club had an election to select a president. 40 members voted in the election and 10 did not vote. What percentage of the members voted?

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Somone me i want to know what 18 hours out of 24 hours in a fraction