For the years from 2001-2010, the number of americans traveling to other countries by plane
can be represented by the polynomial function a(t) = 20t^4 – 428t^3 + 2760t^2 – 4320t + 33,600,
where a is the number of thousands of americans traveling abroad
by airplane and t is the number of years since 2001. in which year
were there 40,000,000 americans traveling abroad? use the
rational root theorem to find your answer.
(hint: consider the function's domain and range before finding all
possible rational roots.)

answerthe vertex form

step-by-step explanation:

x=0

step-by-step explanation:

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