**Answer:**

10π

**Step-by-step explanation:**

First, remember the formula for the circumference of a circle is C= 2πr. Then remember that the diameter is twice the radius.

So here, when we have a diameter of 10ft, and we see the formula for circumference is C= 2πr, and because a Diameter is equal to 2 radii, I can also say C= Dπ. So in your case C= 10ft×π = 10ftπ

**Answer:**

It will take weeks to recycle a total of 45 kg of paper

**Step-by-step explanation:**

W represents the number of weeks the office has been on the new recycling plan

P represents the total kilograms of paper recycled.

It took weeks to recycle P kilograms of paper = W

It took weeks to recycle 1 kilogram of paper =

It took weeks to recycle 45 kilograms of paper =

**Hence It will take **** weeks to recycle a total of 45 kg of paper**

**Answer:**

I think it might be B.) Triangle B

**Step-by-step explanation:**

**Answer: $3.60**

**Step-by-step explanation:**

**If you need 4.8 kilograms of potatoes and each kilograms costs $0.75, then we should multiply 0.75 by 4.8 to find the cost of 4.8 kilograms of potatoes.**

**4.8 x 0.75 = 3.6.**

**Therefore, the cost of 4.8 kilograms is $3.60 dollars. I hope this helps, and good luck!**