Question

Question 19

In standard form 72 crore is written as:
(a)$72\times {10}^7$
(b)$72\times {10}^8$
(c)$7.2\times {10}^8$
(d)$7.2\times {10}^7$

Answer 1

We know that,
A number in standard form is written as $a\times {10}^k,$ where $a$ is the terminating decimal such that $1\le a\le 10$ and $k$ is any integer.
So, $72\text{crore}=72,00,00,000=7.2\times {10}^8$