Your answer would be 520 micrograms, hope this helps :)
Answer:
Step-by-step explanation:
A=a(r)^t
a=1
time=2.5 hours=25/10 ×60=150 minutes
10t=150
t=150/10=15

Hello,
The answer should be 15a^2 - 15
This picture should explain the steps.
Hope this helps!!
Brainliest?
If r is the cost of repairs, then the inequality is:
r > 50