When we have a 75% of the wound healed, we have the following area:
area of the wound=(100%-75%) (initial area) =25% (initial area)
In this case:
area of the wound=25%(80 cm²)=20 cm²
A(t)=80(10^-0.023t)
If A(t)=20
Then:
20=80(10^-0.023t)
10^-0.023t=20/80
10^-0.023t=0.25
log (10^-0.023t)=log 0.25
-0.023t log 10=log0.25 log 10=1
-0.023t=log0.25
t=log 0.25 /-0.023
t=26.176≈26
The wound be healed (75%) in 26 days
The cultural contributions of the <em>Byzantine Empire</em> were:
-Their great system of defense which consisted of 700 km of huge beacons that ran the border of the empire and kept them aware of possible invasions.
-One of the most beautiful and biggest church they built "Haidi Sophia".
-Very good hydraulic engineering techniques.
-They helped to preserve the Greek philosophy, ethics, culture, and language.
Answer: Zheng He
Explanation:
Zheng He was a Chinese explorer who lead seven great voyages on behalf of the Chinese emperor. These voyages traveled through the South China Sea, Indian Ocean, Arabian Sea, Red Sea, and along the east coast of Africa. His seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. However, most historians agree their main purpose was to promote the glory of Ming dynasty China.1
Great wall of china is considered a natural barrier
