I, We can estimate the number of hours in a year comparing the orders of magnitude of both (in seconds).
An hour has 3.6 * 10^3 seconds, and a year has approximately 3.2 * 10^7, so we can approximate the number of hours in a year as:

II. We can calculate the exact value using all the numbers and calculating:

III. In the first part we can approximate the value doing a manual or mental calculation with the digits (3.2/3.6) and substracting the exponents of the power of 10.
In the second case, we calculate the quotient with all the information and then transform the result into scientific notation.
The difference is in the precision of the digits when we do a mental estimation versus a complete calculation. But, we can be in the order of magnitude with not so much error because the most significant part is in the power of 10 and it is easier to calculate even manually.
Answer:
The bottom right.
Step-by-step explanation:
Hope its correct.
So, we have a triangle with the angles of >> 90, 45 and 45 degrees.
Lets say that two of the sides of this triangle is >>4 inches long-, the area would be equal to >>16sq Inches.
Now, If two sides is >> 8 inches long, the area of the triangle would be >> 64sq inches.
Finally, the ratio is >> 8/4=1/2.
So based off this (the work above), the answer would be false.
Answer: 570 cm
Step-by-step explanation: The problem is asking 4560 divided by 8, since they are asking the equal distance each player ran. So 4560 divided by 8 is 570 cm.
Answer:
If only numerator found as zero the answer would be zero. If only denominator found as zero the answer is undefined. In your situation both are zero. But, when denominator becomes zero the answer always be undefined. Therefore, your answer is undefined when both numerator and denominator are zeros.