Can some one me with is question? you want to determine your speed running across the room. what is one piece of data you need? a) the distance you run b) when you start your stopwatch c) how big each step is d) how fast you are moving i know its not c)

D) How fast you are moving

While all the others are useful information (except C), you are trying to solve for your speed, or mph. How fast you are moving is also solved using mph (or something like it).

speed = mph = how fast you are moving ∴ speed = how fast you are moving

~

Choice A

Step-by-step explanation:

You need the distance and the time, which are D and T respectively. The speed or rate is R = D/T. You divide the distance over the time. Example: if run 10 miles in 2 hours, then your speed is R = D/T = 10/2 = 5 mph.

Choice A is correct because we need the distance.

Choice B is close to knowing the time T, but we would need to know the duration and not when the stopwatch was clicked on. In other words, we need to know the difference in when it was started and stopped. Simply knowing the starting point isn't enough. We can cross this off the list.

Choice C is close to what choice A is saying, but choice A is more accurate. We can cross this off the list.

Choice D is what we want to know. If we know how fast we're moving, then there's no need to calculate the speed. So we can cross choice D off the list as well.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: