Use the following recursive formula to answer the question.
a1=−32
an=an−1+12
what is a9?

Step-by-step explanation:

So we've been given a recursive formula, this means that each value depends on the value of

So, in order to find , we must first find and

Then,

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun