exam Maths Puzzle Numerical Ability

graph y= 4/(x+2)(x+6)

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exam Other Question

The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.

Compute the range.
Compute the mean deviation.
Compute the standard deviation.
Solve:
a) (2^x)^2-(3*(2)^x)+2=0
b) (9)(^2x)-(2*(9)^x)-3=0