exam Maths Puzzle Numerical Ability

I need this worked out so I can understand on how to do it. Page 87
The problem is 12% of what is 48?

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exam Other Question

Factor Completely please...

16x^4-81y^4


12b^2+6ab-36a^2

6x^2-30xy+24y2

9a^4+36b^4

25x^4-40x^3+16x^2

81r^4-256s^4

16(x-y)^2-9

x^4-81

x^2+3x=0
23. Calvin Butterbun is driving up a hill in his 2002 Red Convertible Mustang. He runs out of gas. He is 114 meters from the bottom of the hill when this happens. He starts to pa