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y = exx2 + ex : The derivative can be found using the chain rule. (A reminder of the chain rule: if y is a product of two funct...
Rearange the equation to make r the subject of the formula. So we divide both sides by 2(pi)
Area of a cirlce = π x r^2
The radius (r) = the diameter / 2
So, r = 60/2 = 30
Therefore, the area of the ice rink = π x 30^2 = 900π
Surds are irrational numbers that can't be represented accurately as a fraction or reccuring decimal, so they are left as a square root. For example: √ 3 . Calculate the square root of 3 using your calc...
This is a very common mistake, so don't worry. To see why this is the case, let's go back through our notes to the "laws of indices" and recall the rule for adding powers; amTDAnswered by Tutor56252 D. • Maths tutor9367 Views
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