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Since the diameter is 130cm, the radius is half of this, so it is 65cm

Area is Piradius². This means the area is Pi(65cm)²

This means the area...

If we consider this like a normal quadratic problem, this becomes easy

x⁴ < 8x² + 9

x⁴ - 8x² - 9 < 0

(x^2...

If you look at the Taylor series expansion of e^x: e^x = 1 + x + x²/(2!) + x³/(3!) + x⁴/(4!)...

If you then make this e^ix, ...

The chain rule works so that if you have y=f(x)g(x), where f(x) and g(x) are functions of x, dy/dx = f'(x)g(x) + f(x)g'(x)

A: 

We might first consider the form of the poem. Does there appear to be any strict metre or rhyme scheme? No, there does not. We can however see that Eli...