alyons60
30.06.2019 •
Mathematics
Ican't figure this question out. 50 points if you can answer this for me!
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Ответ:
(a) gives the height at time , so the flare's starting height is given by :
(b) There are several ways to find the maximum height of the flare. One is to complete the square and write in vertex form:
That is, describes a parabola whose vertex is located at (9, 406); the coefficient of -5 tells us that the parabola is concave, which means the parabola "opens" downward, and the vertex is a maximum. So the maximum height is 406 m.
(C) The flare hits the ground when :
or at about and . We ignore the negative solution (negative time makes no physical sense).
Ответ:
a. x = sin-1()
x = 66.9 ≈ 67
x = 67°
the measure of the angle formed by the ladder and the level ground is about 67°.
b. x = 10 × cos(75)
x = 2.6
the distance between the foot and the ladder and the foot of the building is 2.6 ft.
hope this mark da brainliest