Find the variance of: 1.1, 2.6, 5.0, 5.4, 5.6, 9.1, 9.2

Pls what is the relative minimum of the function? enter your answer in the box

This question is hard for me to answer can you me. the question is find the value of x.

Adc is formed by reflecting abc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of adc square units. it wont let me put the picture but its a triangular pyramid thats abcd