Scientific Representation of Decimal Number

Q.

Write $7860$ in standard form.

Q. The number $0.00000000016$ when expressed in standard form is written as $1.a\times {10}^b.$ Find the value of $(a+1)b$.

1. 70
2. 61
3. 60
4. -70

Q.

In standard form 21600000 is written as___________.

1. $2.16\times {10}^7$

2. $216\times {10}^7$

3. $2.16\times {10}^5$

4. $216\times 1000000$

Q.

The standard exponential form of 1, 540, 000, 000 is $1.54\times {10}^9$.

1. False

2. True