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How to calculate the sum of the series? ∑ from n=0 to oo (((n^2)*4^n)/(n!))? I know i need to differentiate, but i don't know how? A helicopter is rising at 5.0m/s when a cargo is dropped.The bag falls for 4.0s. A)What is the bag speed when it hits the ground?
B)How far? Find the radius
(X-3)^2+(y+6)^2=? What are some ways to describe the makeup of an ecosystem? If all the orbitals in the the first two principal energy levels are filled, how many electrons are required?