Sound waves, water waves, and light waves are all alike in that they all

Sound and water waves are longitudinal waves, they require a medium to travel through and occilate particles 90 degrees to the wave motion
Light is a transverse wave. It doesnt require a medium to travel through.
All three reflect, refract and diffract

Light is difficult to think of because it acts in ways which waves cannot explain in some cirumstances. It acts like a particle (called photons) in some conditions, but acts like a normal sound or water wave does in others. Try not to get too caught up in light being a wave or a particle because even physists dont know how to explain it yet.

We need to work 6 hours to get 59.95$.

Explanation:

We need to get 59.95$ and the paid for each hour is 10.00$, hence:

Therefore, we need to work 6 hours to get 59.95$.

I hope it helps you!