Answer:
420/30=14 beats per second, meanin 1680 beats is your answer.
Step-by-step explanation:
90° clockwise rotation or 270° anticlockwise rotation
(x,y)=(y,-x)
<em>E(-6,-4)=E'(-4,6)</em>
<em>F(-4,-4)=F'(-4,4)</em>
<em>G(-2,-6)=G'(-6,2)</em>
<em>H(-7,-7)=H'(-7,7)</em>
Therefore, E prime is (-4,6), F prime is (-4,4), G prime is (-6,2) and H prime is (-7,7).
Only B,
Because it is all addition it does not mater what order they are in,..
Concept: Physics Qualitative Analysis.
