The answer is in the picture below I used the square rooting method hope this is the answer you need!
Answer:
3.5x10³
Step-by-step explanation:
7x10^5=700000
2x10^2=200
Divide both by 100
7000÷2=3500
divide by 1000 as standard form is less than 10
1000 is 10 cubed
3500÷1000 is 3.5
∴3.5x10^3 is answer
6.40 is to two decimal places
The square root is 8 the comment above is how you do the work^
