Marcos is making three tile pictures.

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.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41