This is very similar to the last question:-
0.51No = No e^_0.0001t
t = ln 0.51 / 0.0001
= 6733 years
The sum of the adjacent angles of a parallelogram is always equal to 180°.
So we know that

.
When we simplify that expression:

Isolate the y by divide both sides by 3:
Answer:
i think its C
Step-by-step explanation: