Answer:554.64 s
Step-by-step explanation:78/250= e^(-0.0021t)
0.312=e^(-0.0021t)
ln0.312= -0.0021t
t= 554.64 s
Answer:
A
Step-by-step explanation:
6.6 repeating is rational because all repeating numbers are rational. Hope this helps and have a great day.
The answer is 5 I’m not sure if this is correct
The formula of an area of parallelogram:

We have
and 
Substitute:
<em>divide both sides by 6.3</em>

Answer: 