Hello, I do not anderstand this at all. I have been working on radicals and stuff, but this goes way above my head. Please help. Thank you so much! 100 points!

Solve for the following equation step by step and justify your steps when using an exponential property.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?