A fish tank contains 70 litres of water rounded to 1 significant figure. 30 litres of water, rounded to 1 significant figure, are removed form the tank. Work out the upper bond of the volume of water left in the fish tank

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For what value of x does 4x = (1/8) x + 5?

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)