Answer:
3.5x10^3
Step-by-step explanation:
When plugging this into the calculator and dividing them, the answer you get is 3,500.
In scientific notation, you want the decimal to be after the first number (in this case being the 3).
In 3500, our decimal is after the number (0), so we will be moving this decimal place 3 times to the left in order to be placed after the 3.
Now we have 3.500, and since to go back to the original number we had (3500.) we have to move the decimal back 3 places to the right (moving to the right is a positive number), then our answer would be 3.500x10^3.
Now we have to look for how many significant figures we need in our final answer. Since the numbers in our question are 7.0 and 2.0, they both have a total of 2 significant figures, meaning that our final answer has to have 2 significant figures.
Then, our final answer is 3.5x10^3.
***When multiplying or dividing, we round our final answer to the least number of significant figures in the numbers from our question.
***When adding or subtracting, we round our final answer to the least number of decimal places in the numbers from our question.