Since the .16 is in the hundredths place, the fraction is 2 16/100, or 216/100
But if you need to simplify it it's 2 4/25, or 54/25
The angle for x is 180 degrees because it is at the part of the circle that is straight up and down
Answer:
5.73 hours
Step-by-step explanation:
70% decay means 30% remains
.3 = (1/2)^(t/3.3)
take the log of both sides
log.3 = t/3.3 * log1/2
Divide both sides by log 1/2
log.3 / log1/2 = t/3.3
use calculator
1.736965594166206 = t/3.3
multiply both sides by 3.3
5.73198646074848 = t
rounded
t = 5.73 hours