All categories

3 years ago

What is the circumference of a. Ircle of a radius 7cm

Mathematics

1 answer:

adoni [48]3 years ago

7 0

The circumference of a circle of a radius of 7cm would be ≈43.98cm

You might be interested in

The figure is made up of a cylinder and a sphere which has been cut in half. The radius of each half sphere is 5 mm. What is

alexgriva [62]

<h2>Answer:</h2>

<em>Rounded to the nearest hundredth the volume of the composite figure is:</em>

<em>1308 33 cubic millimeters</em>

<h2>Explanation:</h2>

Hello! I wrote the complete question in a comment above. The volume of a cylinder is defined as:

$V_{c}=\pi r^2 h \\ \\ r:radius \\ \\ h:height$

While the volume of half a sphere is:

$V_{hs}=\frac{2}{3}\pi r^3$

Since we have 2 half spheres, then the volume of these is the same as the volume of a sphere:

$V_{s}=\frac{4}{3}\pi r^3$

Then, the composite figure is:

$V=\pi r^2 h +\frac{4}{3}\pi r^3 \\ \\ V=\pi r^2(h+\frac{4}{3}r)$

The radius of the cylinder is the same of the radius of each half sphere. So:

$r=5mm \\ \\ h=10mm \\ \\ \\ V=(3.14) (5)^2((10)+\frac{4}{3}(5)) \\ \\ V=25(3.14)(10+\frac{20}{3}) \\ \\ \boxed{V\approx 1308.33mm^3}$

7 0

3 years ago

Please help me its math 10 points

prisoha [69]

Answer:

it should be 319

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

What does a decreasing slope means in terms of distance?

Sergio [31]

Answer:

Step-by-step explanation:

In terms of distance, a decreasing slope means a slowing speed, which leads to a shorter distance.

7 0

3 years ago

The perimeter of square F is 23 meter less than the perimeter of square G.

Zigmanuir [339]

Answer: b

hope this helps

7 0

3 years ago

The width of a kitchen is 4.2 metres.

Zolol [24]

Answer:

11,67

Step-by-step explanation:

In the order to get the answer, we need to get the right measurements. That is turn the cm into m or 60 cm to 0,6 m because 1 cm is 0.01m. How many cupboards in a kitchen that is 4,2 m long? To get the answer just divide 4,2 m with 0,6 m, and that is 11,67 cupboards in a 4,2 m long kitchen.

3 0

3 years ago

Read 2 more answers