Choice-A is the correct one. It doesn't say it, but it means he'll see the ball reach the catcher's mitt first BEFORE HE HEARS IT slap the mitt.
The angle of depression between the bird and the birdwatcher is 61.32°
In the question, it is said that the distance between two birds is 17.8ft and the distance between the first bird and the birdwatcher is 37.4ft. So, when we draw an image in our mind then we can say that this whole system forms a right-angle triangle with a base of 17.8ft and a hypotenuse of 37.4ft. As we know that to calculate the angle of depression we will use trigonometric equations here i.e.,
cos x = Base/Hypotenuse
cos x = 17.8 / 37.4
cos x = 0.48
x = cos⁻¹(0.48)
x = 61.32°
Thus, the angle of depression is 61.32°.
Learn more about the angle of depression here:
brainly.com/question/26154210
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"Sun's Tidal Effect. Even though the Sun is 391 times as far away from the Earth as the Moon, its force on the Earth is about 175 times as large. Yet its tidal effect is smaller than that of the Moon because tides are caused by the difference in gravity field across the Earth."
Could be c because it matches the question