When multiplying and dividing two numbers in scientific notation, why do u sometimes have to rewrite one factor ?

Mathematics

2 answers:

Free_Kalibri [48]3 years ago

8 0

Answer:You have to rewrite it just in case the lead number isn’t a 1 or a 10

Step-by-step explanation:

zalisa [80]3 years ago

5 0

You sometimes need to rewrite a factor because the lead number is not between 1 and 10 as it needs to be in scientific notation. For instance, if we had lead numbers of 2 and 5, as we do in the following problem.

2x10^3 * 5x10^9

Then we get the answer of 10x10^12. We need to adjust this by moving the decimal place and increasing the exponent by 1. The correct answer would be 1x10^13 instead.

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A furniture store owner buys a sofa for $400 and marks it up 90% to sell it. During the store's anniversary sale, she sells the

nydimaria [60]

Answer:

$570

Step-by-step explanation:

If she marks up the sofa for 90%, she will change the price to 760$

Now, 25% of 760$ is 190$. So, we subtract 190 from 760 and get 570$

Hope this helped, and have a good one!

7 0

2 years ago

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