Suppose that the distribution of weekly water usage for single family homes in a particular city is mound shaped and approximately symmetric. the mean is 1.300 gallons, and standard deviation is 200. what is the approximate value of the 98th percentile

You can find the constant of proportionality by finding the ratio of

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?