exam Maths Puzzle Numerical Ability

Convert

2.75 x 10to -5 power to usual notation.

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exam Other Question

(6m^0)(3^-1m^2n^-4) I got this incorrect on homework and need to correct it. I do not understand how to solve the equation. how do i solve this equation? If f(x)=
5x+3
----- ,then f(c+2)=
x+5

NOTE- 5x+3 is divided by x+5