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11-W/4 = 1+W
11-W = 4+4W (Multiply both sides by 4)
11 = 4+5W (Add W to both sides)
7 = 5W ( Subtract 4 from both sides)
W = 7/5 (D...
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...
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