one circular table has a diameter of 9ft, and another circular table has a diameter of 20ft. How much greater is the large area of the larger table?

C. about 251 ft^2

Step-by-step explanation:

the formula for the area of a circle is A=π r ^2. r (radius) is 1/2 of the diameter. when you plug in table #1 into the equation (A= π 4.5 ^2) you end up with an area of 63.62 ft^2. now plug in table #2 into the equation (A = π 10 ^2) and you'll get an area of 314.16 ft^2. final step is to find the difference between the two areas by subtracting (314.16 - 63.62) and you will get 250.54 ft^2. which rounds up to 251 ft^2.

part a is a horizontal cross section that makes a square.

part b is a vertical cross section that creates a rectangle.

step-by-step explanation:

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet