If (x + y ) ^-1.( x ^-1+ y^ -1 ) = x ^p . y ^p , prove that p + q +2 = 0 .

Which is the correct excel formula for the 80th percentile of a distribution that is n(475, 33)? =norm.dist(80,475,33,1) =norm.inv(0.80,475,33) =norm.s.inv((80-475)/33)?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show