Which is the best estimate for (6.3x10^-2)(9.9x10^-3) written in scientific notation?

Step-by-step explanation:

We are given expression .

In order to multiply above given expression, we need to multiply 6.3 by 9.9 first.

On multiplying 6.3 by 9.9 , we get 62.37.

Now we would multiply  

Therefore,

Therefore,

Again could be written as .

Now, could be round to

Therefore, correct answer is  

the correct answer to your question is a. 4^4

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answer: the answer is 30 miles per hour.

ft/s -> mphmph = ft/s 1.466667mph = 44 divided by 1.466667mph = 30.00000

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