When finding a 95% confidence interval for a mean, x±2sn, what values must you have?

How does reflecting or rotating a figure change the interior angles of the figure?

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?