Adding and Converting Scientific Notation in Real Life

A scientist measures the mass of a small particle as 3.5 x 10^-27 kg. If another particle has a mass of 2.1 x 10^-27 kg, what is the total mass of both particles in scientific notation?

• 4.5 x 10^-27 kg

• 6.0 x 10^-27 kg

• 3.0 x 10^-27 kg

• 5.6 x 10^-27 kg

Tags

CCSS.8.EE.A.4

The distance from Earth to a nearby star is approximately 4.2 x 10^16 meters. If another star is 3.8 x 10^16 meters away, what is the total distance to both stars in scientific notation?

• 9.0 x 10^16 meters

• 7.5 x 10^16 meters

• 8.0 x 10^16 meters

• 8.5 x 10^16 meters

Tags

CCSS.8.EE.A.4

A bacterium can reproduce every 20 minutes. If one bacterium reproduces into 1.5 x 10^6 bacteria in 2 hours, how many bacteria are there after 2 hours in scientific notation?

• 1.0 x 10^6

• 1.5 x 10^6

• 5.0 x 10^5

• 2.0 x 10^6

Tags

CCSS.8.EE.A.4

A small computer chip can hold 1.2 x 10^9 bytes of data. If a larger chip can hold 2.5 x 10^9 bytes, how much data can both chips hold together in scientific notation?

• 4.0 x 10^9 bytes

• 3.7 x 10^9 bytes

• 1.5 x 10^9 bytes

• 2.0 x 10^9 bytes

Tags

CCSS.8.EE.A.4

The volume of a small water bottle is 5.0 x 10^-3 cubic meters. If a larger bottle holds 1.2 x 10^-3 cubic meters, what is the total volume of both bottles in scientific notation?

• 5.5 x 10^-3 m³

• 4.0 x 10^-3 m³

• 6.2 x 10^-3 m³

• 7.0 x 10^-3 m³

Tags

CCSS.8.EE.A.4

A galaxy is estimated to contain about 1.0 x 10^11 stars. If another galaxy contains 2.5 x 10^10 stars, how many stars are there in total in scientific notation?

• 1.25 x 10^11

• 2.0 x 10^11

• 3.5 x 10^11

• 1.0 x 10^10

Tags

CCSS.8.EE.A.4

The speed of light is approximately 3.0 x 10^8 meters per second. If a spaceship travels at 1.5 x 10^8 meters per second, what is the combined speed of both in scientific notation?

• 5.0 x 10^8 m/s

• 3.5 x 10^8 m/s

• 2.0 x 10^8 m/s

• 4.5 x 10^8 m/s

Tags

CCSS.8.EE.A.4

A small virus has a diameter of about 5.0 x 10^-9 meters. If another virus has a diameter of 2.0 x 10^-9 meters, what is the total diameter of both viruses in scientific notation?

• 5.0 x 10^-9 meters

• 7.0 x 10^-9 meters

• 8.0 x 10^-9 meters

• 6.0 x 10^-9 meters

Tags

CCSS.8.EE.A.4

The population of a small town is about 2.5 x 10^4 people. If a neighboring town has a population of 1.5 x 10^4 people, what is the total population of both towns in scientific notation?

• 4.0 x 10^4

• 2.0 x 10^4

• 5.0 x 10^4

• 3.5 x 10^4

Tags

CCSS.8.EE.A.4

A smartphone can process 1.0 x 10^9 calculations per second. If a tablet can process 2.0 x 10^9 calculations per second, how many calculations can both devices process together in scientific notation?

• 2.0 x 10^9

• 4.0 x 10^9

• 3.0 x 10^9

• 1.5 x 10^9

Tags

CCSS.8.EE.A.4