A number that would be rounded to 700 would be 695. if i'm wanting to round to the nearest hundred then i would look at the number behind the number i'm rounding so i would look at 9. 9 is 5 or more so we round up to 700.
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The scale factor of two means you need to multiply the original length by 2:
9 x 2 = 18
The new length would be 18 cm.
horizontal line: x=9
vertical line: y=3
You can plug it into the application demos to see it visually just put y=3 on one line and x=9 on the other
The answer its “i” because there are two complex square roots of −1, namely i and −i,
I hope this help you I gess 16