Mary is looking up at a skyscraper. Her vision is perfectly aligned with the top of the skyscraper. She is 400 feet from the center of the skyscraper. The skyscraper is 850 feet. At what angle is Nancy looking up at the skyscraper? Round your answer to the nearest tenth.

A) 25.2

B) 25.3

C) 64.8

D) 74.8

64.8

Step-by-step explanation:

first you draw out the problem and label the sides of the triangle. since you are finding an angle you use the -1. so looking at the triangle you know that it will be Tan^-1 (Opposite/adjacent). so you write the problem

tan^-1(850/400)= 64.79887635

rounded to the nearest tenth would equal

64.8.

so your answer is 64.8.

Hope this helps! :)

246

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this