- Cho tam giác ABC ke AH vuong goc BC. biết AB =15cm ,CH=16cm ,AH=12cm. Chứng minh tam giác ABC vuông?

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A set of values has a mean of 250 and a standard deviation of 50. What value has a z-score of -2.4? F(x, y) = (1 + 5xy)^(3/2) then nabla(f( x, y) is? Find the directional derivative of the given function at the point (2, 4, -1)? In dimensions, If a measurement is 5.25x5.5 would 5.25 be the width or the height? What is the concentration of As if 5 g of As is found in 10,000 L of water?