Scientific Notation and Significant Figures

Which of the following shows 0.00000070 written correctly in scientific notation?

• 7 x 10^-6

• 7.0 x 10⁶

• 7.0 x 10^-7

• 7 x 10⁷

Which is a correct answer written in scientific notation?

(3.5 x 10¹⁷) / (7 x 10⁸) =

• 0.5 x 10⁸

• 5 x 10⁹

• 5 x 10⁸

• 0.5 x 10¹⁰

How many significant figures are in the number 0.00000070?

• 1

• 2

• 7

• 8

How many significant figures are in 9.00000 x 10^-9?

• 1

• 6

• 2

• 5

Which of the following correctly expresses the number 2.5 x 10^-3 in expanded form?

• 0.0025

• 2500

• 0.00025

• 25000

Which of the following is a correct answer to the following problem:

(6.6 x 10^-8) / (3.3 x 10^-4) =

• 2.0 x 10^-4

• 2.0 x 10^-12

• 2.0 x 10⁴

• 2.0 x 10¹²

Select all answers that have 3 significant figures.

• 0.046 m

• 7.00 kg

• 6.50 x 10^-5

• 0.030

• 500.

Which answer is correct, including significant figures?

5.25 x 1.3 =

• 6.825

• 6.8

• 6.83

• 6.8250

Which answer is correct, including significant figures?

2.674 / 2.0 =

• 1.337

• 1.3

• 1.34

Which answer is correct, including significant figures?

9.0 + 7.66 + 5.44 =

• 22.1

• 22.10

• 22