With sample mean x = 12.5, sample size n = 40 and population standard deviation = 4 find 99% confidence interval for population mean. use formula for one mean z-interval procedure in section 8.2 of etext where zα/2 = 2.575 with sample mean x = 12.5, sample size n = 40 and population standard deviation = 4 find 99% confidence interval for population mean. use formula for one mean z-interval procedure in section 8.2 of etext where zα/2 = 2.575

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.

just get this app called photo math it should be able to do those

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.