For a regular 18 sided polygon what is the degree of rotation

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

What type of aid does nigeria receive? short term, tied, voluntary, bilateral, multilateral or long-term?

Quiero una redaccion de yo soy medico y que tenga 10 lineas