Name _________________________
Scientific Notation
Homework #4
Core _________
Date __________________________
1. Light travels at a speed of 1.86 x 105 miles per second. If a light year is the distance that light
travels in one year, how many miles are in a light year?
2. Assume that there are 20,000 runners in the New York City Marathon. Each runner runs a
distance of 36 miles. If you add together the total number of miles for all runners, how many
times around the globe would the marathon runners have gone? Let the circumference of the
Earth be 2.5 x 104 miles. Calculate your answer using scientific notation.
Perform the following operations and express your answer in scientific notation.
a. (4.3 × 108) x (2.0 × 106)
b.
7.8 ×103
1.2 × 104
c.
6.48 × 105
(2.4 × 104 )(1.8 × 10−2 )