Trackers Inc. produces backpacks in two models, journey and trek. The journey model requires 4 hours of labor, and the company makes a profit of $40. The trek model requires 6 hours of labor, and the company
makes a profit of $80. The distributor will accept no more than 4 trek models and 15 journey models per week.
What is the minimum number of hours of labor that are required for the company to make a profit of at least
$400 per week?
a

12

step-by-step explanation:

i will u if u answer my question in math

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