Express the series using sigma notation. 10 + 50 + 250 + 1250.

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Which of the following is the result of expanding the series

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the