Answer:
9 ft
Step-by-step explanation:
You can use cosine to solve this, which is adjacent over hypotenuse. The ladder forms a triangle with the house, and the side you need to solve for is adjacent to the angle. You can set up the equation:
cos(50)=x/14
Then you multiply 14 by cos(50) and get almost 9 ft (rounding to the nearest tenth of a foot).
For this case we have that by definition, the point-slope equation of a line is given by:

We have the following points:

We chose a point:

Substituting in the equation we have:

Finally, the equation is: 
Answer:
OPTION C
Parameterize the lateral face

of the cylinder by

where

and

, and parameterize the disks

as


where

and

.
The integral along the surface of the cylinder (with outward/positive orientation) is then




I would say 110 becuz if u add all of those together u would get 100 then u find a number that will get you to 210 which would be 110 then u get 210 ..hope this helps sorry if not