Question

1)which of the following expressions is written in scientific notation?

Answer 1

Answer:

1) The correct answer is option D.

2)The correct answer is option A.

3)The correct  answer is option A.

4)The correct  answer is option B.

Step-by-step explanation:

1) Scientific notation is defined mathematical representation used to to represent the a decimal number which present between 1 to 10 multiplied by 10 raised to power equal ti some integer. For example:

$0.00051 =5.1\times 10^{-4}$

Hence, the correct option is D.

2) The scientific notation of number 0.0000000708.

0.0000000708 = $708\times 10^{-10}=7.08\times 10^{-8}$

Hence,the correct answer is option A.

3)When the power of the number ten is in negative.

• if the power is more negative number will be smaller.

• If the power is less negative the number will greater.

Greatest number from the given option is $6.1\times 10^{-7}$

$6.1\times 10^{-7}>4.1\times 10^{-7}>5.1\times 10^{-7}>3.1\times 10^{-7}$

4) $\frac{1}{8000}=0.000125$

$\frac{125}{1000000}=1.25\times 10^{-4}$

Hence, the correct answer is option B.

Answer 2

A1) Option D
A2) Option A
A3) Option A
A4) Option B