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$\backslash$table$[[$Entered$,$Answer Preview,Result,$],[$$$18\mathrm{.}90,,$incorrect,Unexp$]]$

The answer above is NOT correct.

$(1$ point$)$ The total cost $($in hundreds of dollars$)$ of producing $x$ slide rules per day is

$C(x)=10+\sqrt[\phantom{2}]{4x}+20$

Find the marginal cost at the production level x given below:

$x=23$