A DVD has a diameter of 24 centimeters. What is the area of the DVD? Round your answer to the nearest hundredth. Use 3.14 for π.
A hubcap has a radius of 11 centimeters. What is the area of the hubcap? Round your answer to the nearest hundredth. Use 3.14 for π.
452.16
12 x 12 = 144
144 x 3.14 = 452.16
VERY TRASH ANSWER
To find the area of a DVD, we can use the formula for the area of a circle, which is A = πr^2, where A is the area and r is the radius.
In this case, the DVD has a diameter of 24 centimeters. The radius of the DVD can be found by dividing the diameter by 2. So, the radius of the DVD is 24 / 2 = 12 centimeters.
Now we can substitute the radius into the formula to find the area: A = 3.14 * 12^2. Simplifying the equation, we get A = 3.14 * 144 = 452.16 square centimeters.
Rounding the answer to the nearest hundredth, the area of the DVD is approximately 452.16 square centimeters.
For the hubcap, we are given the radius directly. Using the same formula, A = πr^2, where A is the area and r is the radius.
In this case, the radius of the hubcap is 11 centimeters.
Substituting the radius into the formula, we get A = 3.14 * 11^2. Simplifying the equation, we get A = 3.14 * 121 = 379.94 square centimeters.
Rounding the answer to the nearest hundredth, the area of the hubcap is approximately 379.94 square centimeters.
VERY DUMB ANSWER
As always, the area of a circle with radius r is
a = πr^2