Scientific Notation Operations in Word Problems

The Diplodocus dinosaur is believed to have become extinct approximately 1.38x10⁸ years ago.  The Oviraptor is believed to have become extinct approximately 7x10⁷ years ago.  How many years were there between the extinction of these two dinosaur types?

• 6.8 x 10⁸

• 6.8 x 10⁹

• 68 x 10⁸

• 6.8 x 10⁷

The US spends an average of 1.02x10⁴ dollars on each student per year.  There are about 7.6x10⁷ students in the US.  About how much money total is spent on students per year?

• 7.752 x 10¹¹

• 7.752 x 10²⁸

• 8.62 x 10¹¹

• 8.62 x 10²⁸

As part of a community service project, a class planted 7x10⁵  trees in a year.  If there are 3.5x10³ students in the school, how many trees did each student plant?

• 2 x 10⁸

• 2 x 10²

• 3.5 x 10⁸

• 3.5 x 10²

In 2012, New York City (NYC) and Los Angeles (LA) has the highest populations of any cities in the United States. NYC’s population was about 8.1 × 10⁶ and LA’s population was about 3.8 × 10⁶. What is the population of these two cities combined?

• 19 x 10^-7

• 19 x 10⁷

• 11.9 x 10⁶

• 19 x 10⁶

In 1985 Earth had 4.9 ×10⁹ people living on it and in 2005, Earth had 6.4 ×10⁹ living on it. How many more people inhabited Earth in 2005 than in 1985? To solve we should...

• Add

• Subtract

• Multiply

• Divide

A factory can make 3 × 10⁴ t-shirts per day,

how many t-shirts will it make in 2.5 ×10² days?

(3 × 10⁴ ) ( 2.5 × 10²)

• 7,500,000 shirts

• 75,000,000 shirts

• 6,000,000 shirts

• 5,500,000 shirts

The mass of he sun is 1.9 x 10³⁰ kilograms.

The mass of the earth is 5.9 x 10²⁴ kilograms.

How many times bigger is the sun than the earth?

(1.9 x 10³⁰ ) ÷ ( 5.9 x 10²⁴)

• 232,433 times bigger

• 3,223,356 times bigger

• 322,033 times bigger

• 5,323,000 times bigger

The US spends an average of 1.02x10⁴

dollars on each student per year.

There are about 7.6x10⁷ students in the US.

About how much money total is spent on

students per year?

• 7.6 x 10⁷

  dollars per year

• 7.598 x 10⁶

  dollars per year

• 7.7 x 10¹¹

  dollars per year

• 7.45 x 10³

  dollars per year

The population of Algeville is 1.3 x 10⁴. The population of Mathville is 5.6 x 10³. How many more people are there in Algeville?

• 4.3 x 10²

  more people

• 7.4 x 10³

  more people

• 1.86 x 10⁴

  more people

• 7.28 x 10⁷

  more people

The population of Algeville is 1.3 x 10⁴. The population of Mathville is 5.6 x 10³. How many more people are there in Algeville?

• 4.3 x 10²

  more people

• 7.4 x 10³

  more people

• 1.86 x 10⁴

  more people

• 7.28 x 10⁷

  more people