Aconical tent made of canvas has a base that is 20 feet across and a slant height of 14 feet. to the nearest whole unit, what is the area of the canvas, including the floor? use 3.14 for pi.
a. 754 ft2
b. 1,193 ft2
c. 2,135 ft2
d. 534 ft2

Note: A=pi x r^2. 3.14 x 100 = 314 
Floor of the diameter is 20, so the radius is 10. 
To find surface area, do 3.14 x 10 x 14, which equals 439.6.
So using 314, you would add 439.6 and 314 to get 753.6 ft^2. 
Round 753.6 ft^2 to the nearest whole number: 754 ft^2.
The answer is 754 ft^2.
I hope this helped.