Brenda is training for the New York City Triathlon. She is nervous about swimming 1.5 kilometers in the Hudson River. So, she wants to make sure that she can swim that far in a swimming pool. So far, she has swum 20 laps. If each lap is 25 meters, how many more laps does she have to swim?

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.

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.

What is the total surface area of the square pyramid