40 million
985 million
scientific notation

4x10^6,

9.85x10^8

Step-by-step:

Write out the whole number. Count from the period in the number (4,000,000.00 in this case) and then count how many numbers there are until the first number (in this case, 4). There are 6 places before 4, so it will be 4x10^6. If you are going from a smaller number to a bigger number, such as .00001, count from left to right. It would be 1x10^-5

Given is:

The initial height of the candle is 9 inches.

And rate of burning is 0.5 inches per hour.

Part A:

The ordered pairs are: {(0,9),(1,8.5),(2,8),(3,7.5),(4,7),(5,6.5)}

Here we will subtract 0.5 each time, with increasing the time per hour as the rate of burning is 0.5 inches per hour.

Part B:

Yes, it is a function because each x value has its own y value.

Part C:

Yes, the relation would still be a function. The only difference is the time, the candle reduces its height 0.45 inches per each hour so ordered pairs will be :  (0,9)  (1,8.55) (2,8.1)  (3,7.65)