Two buildings are 60 feet apart across a street. a person on top of the shorter building finds the angle of elevation of the roof of the taller building to be 20 degrees and the angle of depression of its base to be 35 degrees. how tall is the taller building to the nearest foot?

The height of the taller building is

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the value of h1

with the angle of elevation

we know that

step 2

Find the value of h2

with the angle of depression

we know that

step 3

Find the height of the taller building

The height of the taller building is the sum of h1 plus h2

so

1) is right

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.