Mastering Scientific Notation: Multiplication & Division Tasks

A scientist measures the mass of a small particle as 3.5 x 10^-9 grams. If she has 7.0 x 10^-3 grams of the same particle, how many particles does she have?

• 5000000

• 2000000

• 1500000

• 100000

A car travels 1.2 x 10^5 meters in a day. How many days will it take to travel 3.6 x 10^6 meters?

• 15 days

• 30 days

• 60 days

• 45 days

A bacteria culture grows at a rate of 2.5 x 10^4 bacteria per hour. How many bacteria will there be after 4 hours?

• 50000

• 100000

• 200000

• 75000

A satellite orbits the Earth at a height of 5.5 x 10^4 meters. If it needs to descend to 1.1 x 10^4 meters, how much lower does it need to go?

• 6.0 x 10^4 meters

• 4.4 x 10^4 meters

• 5.0 x 10^4 meters

• 3.3 x 10^4 meters

A factory produces 1.2 x 10^6 toys in a month. If the factory operates for 5 months, how many toys does it produce in total?

• 1.2 x 10^7

• 6.0 x 10^6

• 7.2 x 10^6

• 5.0 x 10^6

A comet is traveling at a speed of 3.0 x 10^4 kilometers per hour. How far will it travel in 2 hours?

• 30000 kilometers

• 60000 kilometers

• 120000 kilometers

• 45000 kilometers

A researcher finds that a certain chemical is present in 4.5 x 10^-2 liters of solution. If he needs to dilute it to 1.5 x 10^-3 liters, how many times does he need to divide the original amount?

• 45

• 15

• 60

• 30

A smartphone has a storage capacity of 2.0 x 10^2 gigabytes. If a user has 1.0 x 10^1 gigabytes of data, how much storage is left?

• 200 gigabytes

• 150 gigabytes

• 190 gigabytes

• 180 gigabytes

A planet is located 2.5 x 10^8 kilometers from the sun. If a spaceship travels at a speed of 5.0 x 10^4 kilometers per hour, how long will it take to reach the planet?

• 10000 hours

• 2500 hours

• 7500 hours

• 5000 hours

A library has 3.0 x 10^5 books. If 1.5 x 10^2 books are checked out, how many books remain in the library?

• 150

• 299850

• 299900

• 300000