exam Maths Puzzle Numerical Ability

Sketch the graph of f(x)=x 2 squar -9 and find the interval(s) (if any) where f(x)=0

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exam Other Question

perform the indicated calculation. write your result in scientific notation.

(6*10^12)(3.2*10^8)/(1.6*10^7(3*10^2)
A recipe calls for 1 1/3 tablespoons of butter and serves 6 people.If you wish
to cook this recip for yourself,how much butter should you use?