Answer:
54%
Step-by-step explanation:
90,000,000
3*10x10x10x10x10=300,000
3*10x10=300
300*300,000=90,000,000
z^2+9z+20
=z^2+(5+4)z+20
=z^2+5z+4z+20
=z(z+5)+4(z+5)
=(z+5)(z+4)