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LexyClaire
27.03.2021 •
Mathematics
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Ответ:
675![ft^2](/tpl/images/2255/5762/a4c36.png)
Step-by-step explanation:
The radius is 15, so replace r in the formula with 15
A = 225 pi
A = 675
(using 3 for pi, since they specified)
Ответ:
sin 20 = x/3.4
Multiply by 3.4:
3.4sin20 = x
This gives us 3.1 for the vertical distance.
If, however, you need to know the horizontal distance from the starting point, we would use cosine, since that leg is adjacent to the given angle:
cos 20 = x/3.4
3.4cos 20 = x
1.4 = x
The helicopter comes down 1.4 kilometers away from where it lifted off.