56-999999999999999999999-4 is the best for my mom
The right answer is c because it absorbs the heat then it pushes it away like radiation
Answer:
distance between seats = 2*11.10 = 22.20 m
Explanation:
seats row is parallel to a stage with a distance d = 90 m
doorway width = 0.070 m
speaker frequency = 4.00 * 10^4 Hz
Speed of sound = 343 m/s
tone will be heard at

we know that 
so





[tex]x = d*tan\theta = 90*0.1234 = 11.10 m
distance between seats = 2*11.10 = 22.20 m
Answer: 15.87 m
From the equation of motion:

where,
is the distance traveled,
is the initial velocity,
is the acceleration and
is the time.
The rock free falls under gravity. Initial velocity,
, 
It took
for rock to hit the water.
Substitute the values in the given equation:

Hence, the water is 15.87 m below the top level of the well.