The weight of topsoil sold in a week is normally distributed with a mean of $800$ tons and a standard deviation of $80$ tons.

$($a$)$ What percentage of weeks will sales exceed $960$ tons? $($Round your answer to two decimal places.$)$

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$($b$)$ What percentage of weeks will sales be less than $720$ tons? $($Round your answer to two decimal places.$)$

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$($c$)$ What percentage of weeks will sales be between $720$ and $960$ tons? $($Round your answer to two decimal places.$)$

Answer rating: 100% (QA)

Well apply the zscore formula and the characteristics of the normal distribution to solve this issue ... View the full answer