rx and sx
step-by-step explanation:
e^-kt = n/n0 = 0.79
-kt = ln 0.79
t = - ln 0.79/0.0001
= 2357 years
m∠5 + m∠3 = m∠1 is true.
m∠5 + m∠6 = 180 is true
m∠2 +m∠3 = m∠6 is true
m∠2 +m∠3 +m∠5 = 180 is true