Please help:)

See pic attached

Adults: 75, girls: 100, Boys: 75

Step-by-step explanation:

2/5 x 250 = 100( girls)

3/10 x 250 = 75 (boys)

250 - (100 + 75) = 250 - 175 = 75 (Adults)

I believe the answer is 3/10

Step-by-step explanation:

Or do you need the number of adults or fraction? The number of adults is 75

The distance between the observer and the bird is the hypotenuse of the right triangle. Moreover, the distance between the distance between the bird and the nest is the perpendicular of the right triangle. The distance may be calculated using:
Sin(∅) = perpendicular / hypotenuse
perpendicular = sin(35°) * 21000
perpendicular = 12,045 feet

The distance between the bird and its nest is 12,045 feet