Answer:
12.57
Step-by-step explanation:
the formula for the area of a circle is 
the diameter is 2 times the radius, so dividing it by 2 gives you a radius of 2
substitute the 2 for the r in the formula and solve

4
≈12.57
Answer:
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Answer:
The answer is Store 4
Step-by-step explanation:
As before the price increases, Store 4 has the highest price among other Stores. After price increases, Store 4 continued to has highest price among them
The awnser to that question is 80000
6.7*6.7 to find the surface area of the base which is 44.89
4*1/2*10.1*6.7 to fix the surface area of all four triangular faces which is 135.34
Plus them together 44.89+135.34 which is 180.23