Whats 81 x 17/86 + 19855 its on my homeowork-
2 answers:
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Answer:
see explanation
Step-by-step explanation:
There is a right triangle formed between the height above the tower to the plane, the horizontal and the line from the tower to the plane.
The height above the tower to the plane = 13000 - 150 = 12850 ft
The angle between the plane and the tower is 20° , angle of depression.
Using the tangent ratio in the right triangle formed, with the adjacent side being the horizontal ( hor ) distance, then
tan20° = =
( multiply both sides by hor)
hor × tan20° = 12850 ( divide both sides by tan20° )
hor = ≈ 35305 ft ( to the nearest foot )
(2)
Arianna is 60 + 5 = 65 ft above the ground ( to her eye level )
Using the right triangle formed with legs 65 and 37 and angle of depression x, then
tanx° = =
, thus
x = (
) ≈ 30° ( to the nearest degree )
Answer:
Choice B), .
Step-by-step explanation:
Each point on the graph of can be represented as
.
When the graph of is reflected over the x-axis, each point on the graph is also reflected over the x-axis. The x-coordinate of each point will not change but the sign in front of the y-coordinate will flip. For example,
(same as
) will become
, and vice versa. In general,
will become
.
On the other hand, points on the graph of can be represented as
.
is the reflection of
, so
and
shall be equivalent. In other words,
.