The arithmetic mean of 7 numbers is 50. If two positive numbers, n and s, are added to the list, the mean of the nine-number list becomes 60. If s= n^2+80, what are s and n?

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h