You can't you either need another phone/camera, or use something reflective.
When he took office in 1980, Ronald Reagan took a stance that was totally anti communist and wanted the countries that followed communism to fall and was also in favor of ending the Cold War. He was totally against USSR and he cleared his view regarding this matter. The 1993 invasion of Grenada happened under the Presidency of Ronald Reagan.
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
it's suga, sorry I know this doesn't help I just see that you're BTS fan...
