Question

Find the product for each of the following and write your answer in proper scientific notation.

1) (6 x 10^-8) x (4 x 10^-4)


2) (7 x 10^6) x (8 x 10^5)


3) 0.000 000 000 05 x 0.003


4) (3 x 10^-8) x (7 x 10^6)

Answer 1

1. 2.4*10^-11

2. 5.6*10^12

3. 1.5*10^-13

4. 2.1*10^-1

Explanation:

1) (6 x 10^-8) x (4 x 10^-4)=

6*4*10^-8 *10^-4=

24*10^(-8-4)=

24*10^-12=

2.4*10^1 *10^-12=2.4*10^-11

2) (7 x 10^6) x (8 x 10^5)=

7*8*10^6 *10^5=

56*10^11=

5.6*10^1 *10^11=5.6*10^12

3) 0.000 000 000 05 x 0.003=

5*10^-11 *3*10^-3=

5*3*10^-11 *10^-3=

15*10^-14=1.5*10^-13

4) (3 x 10^-8) x (7 x 10^6)=

3*7*10^-8 *10^6=

21*10^(-8+6)=

21*10^-2=2.1*10^-1