<span>KN =KS +SNKS =10Δ MSN is isosceles, because m∠MSN=90⁰, m∠N=45⁰, so m∠NMS=45⁰,
and MS=SN=10.KN =KS +SN =10+10=20
KN=20Area of a trapezoid = (1/2)*(b1+b2)*h
</span><span>b1=10, b2=20, h=10Area of a trapezoid = (1/2)*(10+20)*10=
150Area of trapezoid KLMN
=150KN=20</span><span>
</span>
45 percent because you and the 18 percent country and then the 27 percent rock together
2400*4=9600 so the best estimate will be
b.8000 years old