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timama [110]
3 years ago
15

The circumference of circle a is 3 times greater than the circumference of circle b. If the radius of circle a is 12 meters, wha

t is the radius of circle b
Mathematics
1 answer:
Ilya [14]3 years ago
7 0
The radius is half of the circumference so the circumference of circle a is 24 or (12x2). Because circle a is 3 times bigger you take 24 and divide it by three and you get 8 now you have to divide it by 2 because every are looking for radius and 8 is the circumference. 8 divided by 2 equals 4 so the radius of circle b is 4
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Since the formula for the base of the cylinder is \pi r^{2}, multiplying that by 10 we get 90\pi. Hope this helps!
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3 years ago
HELP IM IN CLASS AND I NEED IT DONE TODAY!
Nesterboy [21]

Answer:

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6 0
2 years ago
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tatuchka [14]
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7 0
3 years ago
Is the ans i got correct?<br>the total surface area is 33.8cm² <br>​
ElenaW [278]

Given:

A prism with height 5 cm and equilateral triangular base with side 2 cm.

To find:

The total surface area of the prism.

Solution:

Area of an equilateral triangle is:

A_1=\dfrac{\sqrt{3}}{4}a^2

Where, a is the side length.

Putting a=2, we get

A_1=\dfrac{\sqrt{3}}{4}(2)^2

A_1=\dfrac{\sqrt{3}}{4}(4)

A_1=\sqrt{3}

A_1\approx \sqrt{3}

The base and top of the prism are congruent so their area must be equal.

The lateral surface area of the prism is:

LA=Ph

Where, P is the perimeter of the base and h is the height of the prism.

The lateral surface area of the prism is:

A_2=(2+2+2)5

A_2=(6)5

A_2=30

Now, the total surface area is the sum of areas of bases and lateral surface area.

A=2A_1+A_2

A=2(1.73)+30

A=3.46+30

A=33.46

Therefore, the total surface area is 33.46 cm².

8 0
2 years ago
The taxi driver charges $3.50 just to get in the cab and then $2.50 per mile. If Lisa travels m miles, which equation
Kryger [21]

Answer:r=2.5m+3.5

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
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