Understanding and writing numbers in scientific notation

The half-life of Uranium is 2.5 x 10⁵ years. What is this in standard form?

• 2500000

• 250

• 25000

• 250000

Express 0.0000000056 in scientific notation.

• 5.6 x 10^-7

• 5.6 x 10^-8

• 5.6 x 10^-9

• 5.6 x 10^-6

Convert to standard form: 
4.56×10⁵

• 456,000
• 45,600,000
• 0.0000456
• 456,000,000,000

Express 40,102 in scientific notation.

• 4.0102 x 10⁴

• 4.01 x 10⁴

• 4.01 x 10^-4

Mathematical Equivalence

OFF

The picture above is taken from a powerful microscope showing colonies of bacteria. The size of bacteria can be as small as 2.0 x 10 ^ -7 meters. What is this number in standard notation?

• 2,000,000

• 0.000002

• 20,000,000

• 0.0000002

Write 0.00001038 in scientific notation.

Write your answer in standard notation.

• 8,700
• 97,000
• 300
• 9,700

How would you write 0.0005 in scientific notation?

• 50 x 10^-5
• 5 x 10^-4
• 5 x 10^-3
• .5 x 10^-3

Level 3

Write 0.000972 in scientific notation.

• 9.72 x 10^-4

• 9.72 x 10^-3

• 972 x 10^-4

• 9.72 x 10⁴