we know that
the surface area of the top of the water
is calculated with the formula of the area of a circle

Step 1
Find the radius of the water tank in the middle of the tank
by proportion

so
For h=5 m
the radius is equal to r=1.5 m
Step 2
Find the surface area


therefore
the answer is
the surface area of the top of the water is 
Answer:
A) Changes in cell shape, size, and organization
Explanation:
Changes in cell shape, size and organisation suggests that a population of cells have changed identity. This could indicate the presence of mutations in the DNA that could lead to uncontrolled cell proliferation or abnormal cell types. These are indicative of tumorigenesis and potential pre-cancerous cells.
According to the research, mentally challenging reduces the risk of loss of brain function, otherwise physically challenging sports involve exercise/physical training.
<h3>What is the difference between mentally challenging and physically challenging sports?</h3>
Mentally challenging sports require a mental effort to do it and cognitive skills.
On the other hand, physically challenging sport is that physical activity that involves endurance, strength, speed and agility.
Therefore, we can conclude that according to the research, mentally challenging reduces the risk of loss of brain function, otherwise physically challenging sports involve exercise/physical training.
Learn more about mentally and physically challenging here: brainly.com/question/7158760
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True.??. I might be wrong, sorry if I am
The answer is homocysteine. <span>Having high levels of homocysteine in the body, it can lead to coronary artery disease. It is also connected with the formation of blood clots that could lead to a stroke or heart attack.</span>