Abird, b is spotted flying 900ft from an observer. the observer, o also spots the top of a tower, t at a height of 200ft. what is the angle of depression from the bird to the observer?
a. 12.52 degrees
b. 12.84 degrees
c. 77.16 degrees
d. 83.69 degrees

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?