An observer (o) spots a plane flying at a 55° angle to his horizontal line of sight. if the plane is flying at an altitude of 21,000 ft., what is the distance (x) from the plane (p) to the observer (o)?

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

In the right triangle OPQ

substitute the values and solve for OP

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to

i think is g(1)=-1.

hope that i can