Answer:
![k = 0.2408](https://img.qammunity.org/2021/formulas/mathematics/college/zem28d50jit0rqng5pndvcnj7yz9v4269k.png)
Explanation:
The first step to solve this equation is placing everything with the exponential to one side of the equality, and everything without the exponential to the other side. So
![3e^(5k) = 10](https://img.qammunity.org/2021/formulas/mathematics/college/hup2ku1j0yozopaw1a578fjb8zi3x3kht3.png)
![e^(5k) = (10)/(3)](https://img.qammunity.org/2021/formulas/mathematics/college/v2n8ouc2lgoyx3vd9dc82yye8r5m348s4c.png)
The ln is the interse operation to the exponential, so we apply the ln to both sides of the equality.
![\ln{e^(5k)} = \ln{(10)/(3)}](https://img.qammunity.org/2021/formulas/mathematics/college/v44srjyxgxjvmnahngdqjbwbg43bajmljd.png)
![5k = 1.204](https://img.qammunity.org/2021/formulas/mathematics/college/kawjph9yr2ll8rmtx3uez9zg55p5m0s46p.png)
![k = (1.204)/(5)](https://img.qammunity.org/2021/formulas/mathematics/college/lw9gk3gabyzdi8tu0ab780wiauajjeh1ff.png)
![k = 0.2408](https://img.qammunity.org/2021/formulas/mathematics/college/zem28d50jit0rqng5pndvcnj7yz9v4269k.png)