Mastering Scientific Notation: Word Problems & Division

A scientist measures the mass of a small particle as 3.2 x 10^-9 grams. If she has 8.0 x 10^-3 grams of the same particle, how many particles does she have?

• 3000000

• 2000000

• 2500000

• 1500000

A car travels a distance of 1.5 x 10^5 meters in 3 hours. What is the average speed of the car in meters per hour?

• 60000 meters per hour

• 50000 meters per hour

• 70000 meters per hour

• 40000 meters per hour

A factory produces 2.5 x 10^6 toys in a year. If the factory operates for 5 years, how many toys does it produce in total?

• 2.5 x 10^6 toys

• 15 x 10^6 toys

• 12.5 x 10^6 toys

• 10 x 10^6 toys

A cell phone tower can transmit signals over a distance of 1.2 x 10^4 meters. If a signal is sent to 3 towers, what is the total distance covered by the signals?

• 1.2 x 10^4 meters

• 2.4 x 10^4 meters

• 4.8 x 10^4 meters

• 3.6 x 10^4 meters

A researcher finds that a certain bacteria can multiply to 1.5 x 10^8 in a petri dish. If the bacteria are divided into 5 equal parts, how many bacteria are in each part?

• 4 x 10^7

• 1 x 10^8

• 3 x 10^7

• 2 x 10^7

A satellite orbits the Earth at a height of 4.0 x 10^7 meters. If it needs to be moved to a height of 1.0 x 10^8 meters, how much higher does it need to go?

• 6.0 x 10^7 meters

• 7.0 x 10^7 meters

• 5.0 x 10^7 meters

• 8.0 x 10^7 meters

A book contains 2.0 x 10^3 pages. If a student reads 4.0 x 10^2 pages each week, how many weeks will it take to finish the book?

• 6 weeks

• 4 weeks

• 10 weeks

• 5 weeks

A computer processes 1.2 x 10^6 calculations per second. How many calculations can it process in 2 minutes?

• 1.2 x 10^7

• 1.2 x 10^9

• 1.44 x 10^8

• 2.4 x 10^8

A water reservoir holds 3.0 x 10^5 liters of water. If it is drained at a rate of 1.5 x 10^2 liters per hour, how many hours will it take to empty the reservoir?

• 1500 hours

• 3000 hours

• 1000 hours

• 2000 hours

A population of fish in a lake is estimated to be 5.0 x 10^4. If the population decreases by 2.5 x 10^3 fish, what is the new estimated population?

• 3.0 x 10^4

• 4.75 x 10^4

• 5.2 x 10^4

• 4.5 x 10^4