4. The local water company in a community has found that the monthly water bills are...

4. The local water company in a community has found that the monthly water bills are normally distributed with a mean of $40 and a standard deviation of $12.

What percent of the water bills are between $20 and $60? Show your work.
What percent of the bills are above $70? Show your work.
What percent of the bills are between $50 and $60? Show your work.
95% of the bills are below what dollar amount? Show your work.

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Expert Solution

orchestra answered 1 year ago

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