During one year, about 163 million adults over 18 years old in the United States spent a total of about 93 billion hours online at home.
a. Write each number in scientific notation.
b. On average, how many hours per day did each adult spend online at home? Show your work using scientific notation.

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

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?

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression