Please help! 25 points is the best i can do rn :)

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Im so bad at fractions they are not my best math thing to work on

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.