exam Maths Puzzle Numerical Ability

How do I get from here: 1.214791=(1+x)^3
To here: 6.7005% = x

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exam Other Question

Find the surface area and volume of a rectangular prism with the given dimensions. Round to the nearest tenth.

1.) e=6.5cm,w=15.1cm,h=4.5cm

thanks so much How do you do the following?
x2-7x+10=0
x2+5x+6=0
x2-3x-4+0
y2+2y-8=0