The value of a tractor decreases over time and is given by V(t) = 75,000 − 7,500t,
where
V(t)
is the value in dollars of the tractor after t years. Find the value (in dollars) of the tractor after 4 years.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations