Acircular piece of glass has a radius of 2.1 meters. the glass sells for $1.70 per square meter. what is the total cost of the circular piece of glass?

Hello! 

To find the total cost, we will need to multiply the cost per square meter, by the total area. To find the area we will use the formula A=πr². We will use 3.14 for pi.

We know that 2.1 is our radius. We will square it and then multiply it by 3.14.

2.1²=4.41
4.41(3.14)≈13.85

Our area is about 13.85. Now we will multiply by $1.70 to find the total cost. This gives us about $23.55.

The total cost of the glass would be about $23.55.

I hope this helps!

The answer to the question is d