<span>Assuming the reaction is of 1st order, we can
start using the formula for rate of 1st order reaction:</span>
dN / dt = k * N
Rearranging,
dN / N = k dt
Where N = amount of sample, k = rate constant, t = time
Integrating the equation from N = Ni to Nf and t = ti to
tf will result in:
ln (Nf / Ni) = k (tf – ti)
Since k is constant, we can equate to situations.
Situation 1 is triple in size every days, situation 2 is after 20 days.
ln (Nf / Ni) / (tf – ti) = k
ln (3Ni / Ni) / 4 = ln (Nf / 40) / 20
Calculating for Nf,
<span>Nf =
9,720 bacteria </span>
Take 36 and add it to 60 it gives you 96 then divide it by 2 and the answer is 48
Answer:
lim [(x(2) + 3) × 1/ x(4) ] = 3 × ( + ○○) = + ○○
Answer:
The answer is D 7 degrees F
Explanation - 7°F
39 + (-5) + 7 = 39 - 5 + 7 = 41
then, the low was 39 + (-5) = 34
thus, 41 - 34 = 7
so, 7°F above the low of 34°F
Hope this helps :D
D. both climbers rested on the wall for 2 minutes
