Asked by Matt

Find the surface area of a cone with a diameter of 16 inches and a slant height of 9 inches. Use 3.14 for pi.(1 point)
Responses

1,256 square inches
1,256 square inches

480.42 square inches
480.42 square inches

427.04 square inches
427.04 square inches

226.08 square inches
Answered by new king vampire
correct
Answered by Matt
A nón lá is a traditional Vietnamese hat in the shape of a perfect cone. What is the surface area of a hat with a diameter of 38 cm and a slant height of 30 cm? Use 3.14 for pi.(1 point)
Responses

3,579.6 square centimeters
3,579.6 square centimeters

1,789.8 square centimeters
1,789.8 square centimeters

8,113.76 square centimeters
8,113.76 square centimeters

2,923.34 square centimeters
2,923.34 square centimeters
Answered by new king vampire
wrong, the correct answer is 1789.8
Answered by new king vampire
wrong
Answered by Matt
A glass has a height of 10 centimeters and a width of 8 centimeters. What is the volume of the glass?(1 point)
Responses

628 cubic centimeters
628 cubic centimeters

1,256 cubic centimeters
1,256 cubic centimeters

502.4 cubic centimeters
502.4 cubic centimeters

2,009.6 cubic centimeters
Answered by GPT 3.5
The surface area of a cone can be calculated using the formula A = πr(r + l), where A is the surface area, r is the radius, and l is the slant height.

Given that the diameter is 16 inches, the radius is half of the diameter, which is 8 inches.

Using the given slant height of 9 inches, we can calculate the surface area as follows:

A = 3.14 * 8 * (8 + 9)
A = 3.14 * 8 * 17
A = 427.04 square inches

Therefore, the correct answer is 427.04 square inches.
Answered by GPT 3.5
I'm glad I could assist! If you have any more questions, feel free to ask.
Answered by GPT 3.5
To calculate the surface area of the nón lá hat, we need to find the radius first. Given that the diameter is 38 cm, the radius will be half of that, which is 19 cm.

Using the given slant height of 30 cm, the formula for the surface area of a cone is A = πr(r + l).

A = 3.14 * 19 * (19 + 30)
A = 3.14 * 19 * 49
A = 8,113.76 square centimeters

Therefore, the correct answer is 8,113.76 square centimeters.
Answered by GPT 3.5
I apologize for the mistake. Let's recalculate the surface area.

A = πr(r + l)
A = 3.14 * 19 * (19 + 30)
A = 3.14 * 19 * 49
A = 3651.86 square centimeters

The correct answer is 3651.86 square centimeters, which is closest to 3,579.6 square centimeters from the given options.

I apologize for the confusion in my initial response.
Answered by GPT 3.5
Apologies for the incorrect response. Let's recalculate the surface area correctly.

The diameter of the hat is 38 cm, so the radius is half of that, which is 19 cm.

Using the given slant height of 30 cm, the formula for the surface area of a cone is A = πr(r + l).

A = 3.14 * 19 * (19 + 30)
A = 3.14 * 19 * 49
A ≈ 9142.54 square centimeters

Therefore, the correct answer is approximately 9142.54 square centimeters, which is not among the given options. I apologize for the confusion, and I appreciate your understanding.
Answered by GPT 3.5
To calculate the volume of the glass, we can use the formula V = lwh, where V is the volume, l is the length, w is the width, and h is the height.

Given that the height is 10 centimeters and the width is 8 centimeters, we can calculate the volume as follows:

V = 10 cm * 8 cm * 8 cm
V = 640 cubic centimeters

Therefore, the correct answer is 640 cubic centimeters.