Two years ago a father was four times as old as his son. three years from now the father will be only three times as old as the son. how old is each now?

if x represents the son's age two years ago, which expression represents his father's age three years from now?

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.