exam Maths Puzzle Numerical Ability

how is this problem solved? [1/8] with exponent of -4/3

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exam Other Question

Hi, I need help finding the domain and range for this piecewise defined function
.
f(x) = { x + 6,{{{ x <= -4 }}} }
......{ x + 10,{{{ -4<x<8 }}}
......{ 30, {{{ x >= 8 }}} }
a company produces a product for which the varible cost is $12.30 per unit and the fixed costs are $98,000. the product sells for $17.98. let x be the number of units produced a