At Burnt Mesa Pueblo, archaeological studies have used the method of tree-ring dating in an effort to determine when prehistoric people lived in the pueblo. Wood from several excavations gave a mean of (year) 1243 with a standard deviation of 29 years. The distribution of dates was more or less mound-shaped and symmetrical about the mean. Use the empirical rule to estimate the following.(a) a range of years centered about the mean in which about 68% of the data (tree-ring dates) will be found between 213 and X A. D. (b) a range of years centered about the mean in which about 95% of the data ring dates) will be found between and A. D. (c) a range of years centered about the mean in which almost all the data (tree-ring dates) will be found and between A. D.

its the second choice.

step-by-step explanation:

the elements in the range will be 7 less than the elements in the domain.

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof

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.