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MATH EQUATION help: I took a photo of the problem I need help with. Can someone help break this down for me? Thanks!? If a 30 -meter pine tree casts a shadow of 30 meters, how far is the tip of the shadow from the top of the tree? Prove that b1/s(b1) is equal to (r12*sqrt(n-2))/sqrt(1-r12^2). (The two t statistics)? If a page of 90-page book is missing and the sum of remaining page numbers is 4012, what is the page number of the missing page? Can someone help me with this question? I think the planes don't intersect.?