There are 520'pages in the whole book because if you divide 390 by 3 you get 130 and if you multiply that by 4 you get 520, hope this helps! Please give brainiest answer and say thanks.
The force exerted on victim is 20 newton
<em><u>Solution:</u></em>
An attacker swings a board with a mass of 2 kg toward a victim
The acceleration is 10
when the board hits the victim
To find: Force exerted on victim
<em><u>The force is given by formula:</u></em>

From given,

<em><u>Substituting the values in formula,</u></em>

Thus force exerted on victim is 20 newton
The answer is 460 because if you round 450 to the nearest 10 it equals 460
Let x = the other rational number.
x(66/7) = (48/5)
Solve for x to find your answer.