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Travka [436]
3 years ago
6

What is the best estimate of the circumference of a circle with a diameter of 47 mm: a) 141mm b) 139mm c) 121mm d) 100mm

Mathematics
1 answer:
Marina86 [1]3 years ago
7 0
Using the formulasC=2π r
d=2r
Solving for C:
C=π
d=π·47≈147.65485mm

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Maggie was doing research for her Ph.D. in physics when a 12 mg sample of radioactive material decayed to 3 mg in 26 minutes. De
netineya [11]

The general way to work this out is to solve the general expression for
the remaining quantity versus half-life, using logarithms.  But that's not
necessary with these numbers.

Look at the numbers:

-- 3 mg is  1/4  of  12 mg.

-- 1/4  is the product of  (1/2) x (1/2).

-- So the  3 mg is what's left of  12 mg after  2  half-lives.
The  26  minutes must be two half-lives.

-- The half-life of that substance is  26/2 = <em>13 minutes</em>.

Go Maggie !

3 0
3 years ago
Given a set of data with the Regression Line: y = 3.5x + 18.5
Tomtit [17]

Answer:

1.5

Step-by-step explanation:

y=3.5*100+18.5=368.5\\rv=370-368.5=1.5

4 0
3 years ago
PLEASE HELP!!!
Salsk061 [2.6K]
Triangular
I think that it
4 0
3 years ago
What's the greatest common factor of: 2*2*2*2*3*3*3*5*2*2*3*3*3*7
erastova [34]

the greater common factor is : a.2

5 0
3 years ago
Read 2 more answers
Im new to this app can someone help me please and thank u so much
GaryK [48]

Answer:

3\frac{1}{4}

Step-by-step explanation:

we have to  divide the given distance by 3.

Then we will be able to find the distance between markers.

Given distance is

9\frac{3}{4} \\=\frac{36+3}{4}\\ =\frac{39}{4}

Since, there are three markers,

So, we have to divide this distance by  3

So, the distance between markers is-

\frac{\frac{39}{4}} {3} \\=\frac{39}{4} * \frac{1}{3} \\=\frac{13}{4}


So, the distance between marker is

\frac{13}{4}

Now, we have to convert this into mixed number.

Then, the distance is-

\frac{13}{4}\\ =3\frac{1}{4}

4 0
3 years ago
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