Answer:
7 seconds
Step-by-step explanation:
Distance of the coin above the water is modeled by the equation

where
is time taken to cover the distance
Now equating with zero.

So, time taken by the coin to hit the water is 7 seconds.
Answer:
is this an essay question?
Answer:
x=21
Step-by-step explanation:
The two angles form a straight line so they add to 180
6x+2+52 = 180
6x+54= 180
Subtract 54 from each side
6x+54-54 = 180-54
6x= 126
Divide by 6
6x/6 =126/6
x = 21
Answer
cos c = 40/41
Step by step explanation
It is a right triangle.
AB^2 + BC^2 = AC^2
9^2 + 40^2 = 41^2
81 + 1600 = 1681
1681 = 1681
Cos C = Opposite/Hypotenuse
Cos C = 40/41 [opposite = 40 and Hypotenuse = 41]
Thank you.
Answer:
F
Step-by-step explanation: