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प्रश्न
Express the number appearing in the given statement in standard form.
Size of a bacteria is 0.0000005 m
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उत्तर
Standard form of given statement
0.0000005
= 5 × 10−7
संबंधित प्रश्न
Express the given numbers in usual form.
3.02 × 10-6
Express the following number in standard form.
0.000035
Very small numbers can be expressed in standard form by using ______ exponents.
Very large numbers can be expressed in standard form by using ______ exponents.
Some migratory birds travel as much as 15,000 km to escape the extreme climatic conditions at home. Write the distance in metres using scientific notation.
A sugar factory has annual sales of 3 billion 720 million kilograms of sugar. Express this number in the standard form.
While studying her family’s history. Shikha discovers records of ancestors 12 generations back. She wonders how many ancestors she has had in the past 12 generations. She starts to make a diagram to help her figure this out. The diagram soon becomes very complex.
- Make a table and a graph showing the number of ancestors in each of the 12 generations.
- Write an equation for the number of ancestors in a given generation n.
A half-life is the amount of time that it takes for a radioactive substance to decay to one half of its original quantity.
Suppose radioactive decay causes 300 grams of a substance to decrease to 300 × 2–3 grams after 3 half-lives. Evaluate 300 × 2–3 to determine how many grams of the substance are left.
Explain why the expression 300 × 2–n can be used to find the amount of the substance that remains after n half-lives.
Consider a quantity of a radioactive substance. The fraction of this quantity that remains after t half-lives can be found by using the expression 3–t. After how many half-lives will the fraction be `1/243` of the original?
Express the following in exponential form:
`400/3969`
