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You have three keys in your pocket which you extract in a random way to unlock a lock. Assume that exactly one key opens the door when you pick it out of your pocket. Find the expectation value of the number of times you need to pick out a key to unlock.

Let X be the random variable for this question. P(X=x) = 1/3 for all x. When X=x, we have that it took x times for us to retrieve the correct key.Thus, we have the infinite sum 1/3 + 2 2/3 1/3 + 3*(2/3)^2 1/...
NO
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explain process of glycolysis

firstly, glucose is converted into glucose phosphate and then into glucose biphoshate through phosphorylation. This process turns two molecules of ATP to ADP. This is then split into two molecules (3 carbons...
YH
Answered by Yasmin H. • Biology tutor
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Describe the differences between different types of blood vessels

Capillaries-one cell thick, minimal diffusion distanceveins-wise lumen, many elastic fibres, valves presentarteries-thick muscular layer to withstand BP
BV
Answered by Bela V. • Biology tutor
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Write about an inspirational person in your life (100 words)

This would be regarded as a writing task. The student would need to apply the following grammar rules: Correct use of case endings (where possible)Use of conjunctions / variety of conjunctionsUse of present,...
AL
Answered by Anna L. • Russian tutor
1719 Views

A curve has equation y = e^(3x-x^3) . Find the exact values of the coordinates of the stationary points of the curve and determine the nature of these stationary points.

In order to find the stationary points we need to find the first derivative, set it to 0 and solve for x. We can then use this value to find the value for y.y = e (3x-x^3) We know for the derivative of e to ...
PM
Answered by Philip M. • Maths tutor
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