Dory can run 3.25 miles every hour. How long will it take her to run a race that is 16 1/4 miles long? pls help

Np4=12np2 with clear explanation.

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u