Step 1 :Given that the initial population \(P_0\) is 460 and after 2 hours the population is 920, we can substitute these values into the equation to find the growth rate \(k\): \[920 = 460 * e^{2k}\]
Step 2 :Divide both sides by 460: \[2 = e^{2k}\]
Step 3 :Take the natural logarithm of both sides: \[\ln(2) = 2k\]
Step 4 :Solve for \(k\): \[k = \frac{\ln(2)}{2}\]
Step 5 :Substitute \(k\) back into the original equation: \[P(t) = 460 * e^{t * \frac{\ln(2)}{2}}\]
Step 6 :To find the population after 6 hours, substitute \(t = 6\) into the equation: \[P(6) = 460 * e^{6 * \frac{\ln(2)}{2}} = 3680\]
Step 7 :To find the time it takes for the population to reach 2790, set \(P(t) = 2790\) and solve for \(t\): \[2790 = 460 * e^{t * \frac{\ln(2)}{2}}\]
Step 8 :Divide both sides by 460: \[6.065217391 = e^{t * \frac{\ln(2)}{2}}\]
Step 9 :Take the natural logarithm of both sides: \[\ln(6.065217391) = t * \frac{\ln(2)}{2}\]
Step 10 :Solve for \(t\): \[t = \frac{2 * \ln(6.065217391)}{\ln(2)}\]
Step 11 :\(\boxed{t \approx 5.26 \text{ hours}}\)