The ratio of boys to girls is 2/3. there is a class of 40 students. how many girls are in the class?

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?