Factor the equation in the picture

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.

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

Secant be and cf intersect at point d inside a what is the measure of cde