a ranger standing 100 feet from a tree sights the top of the tree at 40 degrees angle of elevation if the height of the ranger is 5 feet find the height of the tree

Find the slope of the line y =8/9x + 1.

The scatter plot shows the number of animal cells clara examined in a laboratory in different months: plot ordered pairs 1, 20 and 2, 60 and 3,100 and 4, 140 and 5, 180 what is the approximate predicted number of animal cells clara examined in the 9th month?

For the sequence [tex]a_{n} = 2n/(n+1)[/tex], what is the value of [tex]a_{10}[/tex]