Advertisements
Advertisements
Question
Express `(1.5 xx 10^6)/(2.5 xx 10^-4)` in the standard form.
Advertisements
Solution
Given, `(1.5 xx 10^6)/(2.5 xx 10^-4) xx 10^(6 + 4)` ...[∵ am + an = (a)m – n]
= `3/5 xx 10^10`
= 0.6 × 1010
= 6 × 1010 × 10–1 ...[∵ am × an = am + n]
= 6 × 109
APPEARS IN
RELATED QUESTIONS
Express the given numbers in usual form.
1.0001 × 109
Write the following numbers in the usual form:
3.02 × 10−6
Express the following number in the usual form.
The usual form of 2.39461 × 106 is _______.
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.
Special balances can weigh something as 0.00000001 gram. Express this number in the standard form.
Express the following in standard form:
A Helium atom has a diameter of 0.000000022 cm.
Express the following in standard form:
Express 5 hectares in cm2 (1 hectare = 10000 m2)
At the end of the 20th century, the world population was approximately 6.1 × 109 people. Express this population in usual form. How would you say this number in words?
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?
