Question

in exercises 7-12, write the number in decimal form.

1. $3.8 \times 10^5$
2. $3.8 \times 10^{-5}$
3. $3.80 \times 10^7$
4. $6.25 \times 10^4$
5. $6.25 \times 10^{-3}$
6. $6.25 \times 10^{-8}$

Explanation:

Step1: Move decimal right 5 places

$3.8 \times 10^5 = 380000$

Step2: Move decimal left 5 places

$3.8 \times 10^{-5} = 0.000038$

Step3: Move decimal right 7 places

$3.80 \times 10^7 = 38000000$

Step4: Move decimal right 4 places

$6.25 \times 10^4 = 62500$

Step5: Move decimal left 3 places

$6.25 \times 10^{-3} = 0.00625$

Step6: Move decimal left 8 places

$6.25 \times 10^{-8} = 0.0000000625$

Answer:

1. $380000$
2. $0.000038$
3. $38000000$
4. $62500$
5. $0.00625$
6. $0.0000000625$