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 
They can watch informal videos,take notes and participate in the class/ask questions.
The answer is D, embraces challenges.
I think it would be A. Because if you don’t cover a sneeze you will get germs on most things that people touch
Biomechanics is the term. Its studies the structure and function of biological systems.