D, 8880 is divisible by both ten and 5.
<span> half life i= 78 hours
amount after 78 hours is 395 kg:
395 = 790e^(k*78)
Dividing by 790 and taking natural log
ln (395/790) = (k*78)
-0.6931 = 78k
-0.00888 = k
lets calculate how much is left after 18 hours:
Amount(18)
= 790e^(-0.00888*18)
Amount = 673.301 kg
hope this helps</span>
I will give u the steps
add up all of the values
then when you find the total lets say its 100% then total percent of cars would be 32%
2 is the correct answer....gitty up
