exam Maths Puzzle Numerical Ability

In thirty years, James will be 8 times as old as, He was 12 years ago. How old is he now?

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exam Other Question

f(x)= -square root of (x-3) +4 (not under square root.
Using transformations, graph the function by hand
2. Convert to scientific notation (here you may use x as multiplication):
0.00452