Which statement about this figure is true? A. It has rotational symmetry with an angle of rotation of 60°.

B. It has reflectional symmetry with one line of symmetry.

C. It has no reflectional symmetry.

D. It has rotational symmetry with an angle of rotation of 120°>​

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean