How do you use cubic function in real life?

I am both a Mechanical and an Electrical engineer ( aka use math in real life every day) and I work every day with systems described by exponential or logarithmic functions. Just to name a few:...

You own a ski resort. In the winter, the amount of customers go up. In the summer, the amount of customers go down.

a) Define the concept of culture. Also describe the national cultural variables and individual cultural variables with examples.

Can you use trigonomic functions in real life situations? It's not like you carry a calculator with you everywhere... Very unlikely unless you have a job that requires trig skills.

If you work in science or engineering, you will need radical functions (and other advanced math topics) all the time. Otherwise, you won't have much need for radical functions.