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Ivanshal [37]
3 years ago
8

the diameter of the earth at the equator is about 8,000 mi. Based on this figure ,how far is it exactly around the earth

Mathematics
2 answers:
Brrunno [24]3 years ago
8 0
Basically, we want to find the circumfernece of the earth
C=pid
d=diameter
pi=pi (aprox pi=3.1419256)
C=3.14159256*8000
C=25132.74048 feet
geniusboy [140]3 years ago
8 0
C = 2 π r
C = 8,000 π or 25,133 miles
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Find the odds for and the odds against the event rolling a fair die and getting a 4 comma a 5 comma or a 2.
skelet666 [1.2K]

The odds in favor are 3:3 which reduces to 1:1

There are 3 ways to get what we want, which is 4, 5 or 2. There are 3 ways to get what we don't want (1,3,or 6). So we list those two values as a ratio like so 3:3, which reduces to 1:1 after you divide both parts by 3.

Here's another example. If we wanted to know the odds in favor of rolling a 5 or 6, then the answer would be 2:4 which reduces to 1:2. This is because there are 2 ways to get what we want (rolling a 5 or 6) and 4 ways to get what we don't want (rolling either 1,2,3, or 4). The number of events we favor is listed first when it comes to "odds in favor" problems.

4 0
4 years ago
Calculate the percentage change of a movie tickets of $6 is now $8?​
marin [14]

Answer:

33.33%

Step-by-step explanation:

Formula for calculating Percentage change =

<u>New Price - Old Price</u>     x <u>100</u>

         Old Price                        1

Where new price is $8

Old Price is $6

Step 2: Input the variables in the above formula

          <u>$8 - $6</u>    x    <u>100</u>

            $6                 1

        =   <u>$2</u>      x  100

             $6

= $0.333 x 100 =    33.33%

Percentage change  = 33.33%

4 0
3 years ago
A spherical balloon is inflated so that its volume is increasing at the rate of 2.7 ft3/min. How rapidly is the diameter of the
Mice21 [21]
The formula for volume of a sphere is
V=\frac{4}{3}\pi r^{3}
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We are given
\frac{dV}{dt}=2.7 and r=0.65
\rightarrow2.7=4\pi(0.65)^{2}\frac{dr}{dt}
\rightarrow\frac{dr}{dt}=\frac{2.7}{4\pi(0.65)^{2}}\approx0.5085\ ft/min

Change in diameter is twice change in radius, so we get 2*0.5085=1.017 ft/min
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4 years ago
Some rectangles are not parallelograms
VARVARA [1.3K]

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I'm not sure what your asking, but, no, all rectangles are parallelograms.

I found this over the internet, and I hope it helps you understand why a rectangle is always a parallelogram, but a parallelogram is not always a rectangle:

It is true that every rectangle is a parallelogram, but it is not true that every parallelogram is not a rectangle. For instance, take a square. It's a parallelogram — it is a quadrilateral with two pairs of parallel faces. But it is also a rectangle — it is a quadrilateral with four right angles.

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4 years ago
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JulijaS [17]
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