exam Maths Puzzle Numerical Ability

A rectangular hole 2cm wide and x cm long is cut in a retangular sheet 3.5cm wide and y cm long. The lentgh of the hole is 1 cm less than the length of the sheet. After the hole is

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exam Other Question

The amount of time it takes to clean a restaurent is given by f(c)=10+2c where c is the number if customers they had. what is the range of this function? Find the domain of the function algebraically:
f(x) = (x^2+ 4)^1/2