exam Maths Puzzle Numerical Ability

19. simplify
(mn2)-3

36. (2a2y-4z-5)3

73. multiply or divide and write scientific notation for the result.
(5.2 * 10 to the power of 5)(6.5 * 10 to the power of -2)

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exam Other Question

I need help in finding the x-intercept and the y-intercept of this function

f(x)=3/x2-4 Jeff is two years younger than Carrie. 12 years ago, Carrie was twice as old as Jeff. How old is Jeff now?

Thank you!:o)