exam Maths Puzzle Numerical Ability

how do you simplify 3(1.2 x 10^-4) then write it in scientific notation?

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exam Other Question

how do you graph f(x)=|x+1|+2 a three digit number when the sum of the three numbers is 11. if the number is reversed the new number is 46 more than five times the number. the hundreds digit plus twice the tens