Find the area of a circle with the radius to 9.6 meters. Use 3.14 for pi. Round your answer to the nearest hundredth.
30.14
289.38
60.29
1157.53
Find the exact area of the circle with a diameter of 5 yards use 3.14 for pi.
15.7
19.625
39.25
78.513
Brayden started that a flying disk had circumferences of 43.96 Eliza wanted to find the same area of the disc. What is the area of the flying disc rounded to the nearest whole number both Brayden and Elisa used 3.14 for pi
108
395
615
154
A pizza has a circumference of 12pi inches find the exact area of the pizza use 3.14 for pi
452.16
226.08
113.04
37.68
I have no idea for any of them so please help
Wrong its:
B
B
D
C
Would it be A A B D or no
area A = πr^2
circumference C = 2πr
so plug in your numbers ...
show your work if you get stuck.
Sure, I'll help you with each of the questions.
1. To find the area of a circle with a radius of 9.6 meters, you can use the formula: A = πr^2. In this case, the radius (r) is given as 9.6 meters, and the value of π is given as 3.14. Plugging in these values into the formula, we get A = 3.14 * (9.6)^2. Solving this equation gives us an area of approximately 289.38 square meters. Therefore, the correct answer is 289.38.
2. To find the exact area of a circle with a diameter of 5 yards, you can again use the formula: A = πr^2. However, here we are given the diameter (d), not the radius. The radius is half the value of the diameter, so r = d/2 = 5/2 = 2.5 yards. Plugging in these values into the formula, we get A = 3.14 * (2.5)^2. Solving this equation gives us an exact area of 19.625 square yards. Therefore, the correct answer is 19.625.
3. Brayden and Eliza both used the circumference of 43.96 to find the area of the disk. However, the circumference and area of a circle are not directly related. To find the area, we again use the formula: A = πr^2. Since we are not given the radius directly, we need to find it using the circumference. The formula for circumference is C = 2πr. Plugging in the value of the circumference (43.96) into this equation, we get 43.96 = 2 * 3.14 * r. Solving for r gives us r = 43.96 / (2 * 3.14) ≈ 7.0. Now, we can find the area using the formula: A = 3.14 * (7.0)^2. Solving this equation gives us an area of approximately 153.86 square units. Rounding this to the nearest whole number, we get the correct answer as 154.
4. Here, we are given the circumference of the pizza as 12π inches. Since circumference is given, we can find the radius using the formula: C = 2πr. Plugging in the value of the circumference (12π), we get 12π = 2 * 3.14 * r. Solving for r gives us r = (12π) / (2 * 3.14) ≈ 6.0. Now, we can find the area using the formula: A = 3.14 * (6.0)^2. Solving this equation gives us an exact area of 113.04 square inches. Therefore, the correct answer is 113.04.
I hope this explanation helps you understand how to solve these types of questions! Let me know if you have any further questions.
30.14
19.625
39.25
452.16