Operations Scientific Notation

The mass of a substance is 8 X 10⁹ micrograms. If one microgram is equal to 1 X 10^-6 grams, what is its mass in grams?

• 1.25 X 10^-15 grams

• 1.25 X 10^-3 grams

• 8 X 10³ grams

• 8 X 10¹⁵ grams

A rectangular section of land made up of wheat farms has a length of 5 X 10⁴ meters and a width of 6 X 10³ meters What is the area of the land in square meters?

• 3 X 10⁶ m²

• 3 X 10⁷ m²

• 3 X 10⁸ m²

• 3 X 10¹² m²

Neptune is approximately 5 X 10⁴ kilometers in diameter. Mars is approximately 7 X 10³ kilometers in diameter. What is an accurate comparison of the diameters of these two planets?

• The diameter of Neptune is more than 7 times greater than that of Mars.

• The diameter of Mars is more than 7 times greater than that of Neptune.

• The diameter of Neptune is about 1.4 times greater than the diameter of Mars.

• The diameter of Mars is about 1.4 times greater than the diameter of Neptune.

A box contains 5 X 10³ paper clips. The mass of each paper clip is 8 X 10^-4 kilograms. What is the combined mass of the paper clips in the box?

• 4 kilograms

• 40 kilograms

• 4 X 10⁷ kilograms

• 4 X 10^-7 kilograms

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

• 4.08 x 10^-8
• 4.8 x 10²
• 4.08 x 10²
• 4.08 x 10^-15

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

• 3 x 10¹⁰
• 3 x 10⁴
• 3 x 10^-4
• 3 x 10^-11

Write the answer in scientific notation.

4.1 x 10⁵ + 5.5 x 10⁶ =

• 5.91 x 10⁶

• 9.6 x 10⁵

• 9.6 x 10¹¹

• 4.65 x 10⁵

Which is the largest number?

4.8 x 10^-6

1.3 x 10²⁰

3.1 x 10^-4

9.2 x 10^-5

9.5 x 10³²

5.9 x 10^-5

2.9 x 10²¹

8.4 x 10¹⁹

• 9.5 x 10³²

• 3.1 x 10^-4

• 8.4 x 10¹⁹

• 4.8 x 10^-6

Cell A = 4.2 x 10^-4

Cell B = 2.1 x 10^-5

Cell C = 8.4 x 10^-4

Cell C is ___ larger than cell A.

• 2x

• 20x

• .2x

• 4x

Find the difference.

(3.8 x 10⁴) - (2 x 10³)

• 1.8 x 10⁴

• 1.8 x 10¹

• 3.6 x 10¹

• 3.6 x 10⁴