What is the standard form for f(x)= 5-3x^3+7x^2

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.

How can you construct perpendicular lines and prove theorems about perpendicular lines

1: 4 if the wew 35 surfboards at the beach how many were short boards?