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Llana [10]
3 years ago
13

Find the circumference and the area of a circle with diameter 7 cm.

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
3 0

Answer:

21.98 is the circumference because is it 7 pi 7 times 3.14. For the area though it is 38.48 because you need to get the radius of the circle and you divided 7 by 2 which is 3.5 and here is the work A=πr2=π·3.52≈38.48451

Step-by-step explanation:

Hope this helped and you understood if you want it would help a lot if you put it brainliest.

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Solve for the values of x in the equation: <br> 2^(x) = 4x.
Eva8 [605]

There are two of them. 

I don't know a mechanical way to 'solve' for them.

One can be found by trial and error:

x=0 . . . . . 2^0 = 1 . . . . . 4(0) = 0 . . . . . no, that doesn't work
x=1 . . . . . 2^1 = 2 . . . . . 4(1) = 4 . . . . . no, that doesn't work
x=2 . . . . . 2^2 = 4 . . . . . 4(2) = 8 . . . . . no, that doesn't work
x=3 . . . . . 2^3 = 8 . . . . . 4(3) = 12 . . . . no, that doesn't work
<em>x=4</em> . . . . . 2^4 = <em><u>16</u></em> . . . . 4(4) = <em><u>16</u></em> . . . . Yes !  That works !       yay !

For the other one, I constructed tables of values for 2^x and (4x)
in a spread sheet, then graphed them, and looked for the point
where the graphs of the two expressions cross.

The point is near, but not exactly,         <em>x = 0.30990693...

</em>
If there's a way to find an analytical expression for the value, it must involve
some esoteric kind of math operations that I didn't learn in high school or
engineering school, and which has thus far eluded me during my lengthy
residency in the college of hard knocks.<em> </em> If anybody out there has it, I'm
waiting with all ears.<em>

</em>
7 0
2 years ago
Read 2 more answers
I need help plz..No spam​
Lilit [14]

Answer:

oytqlrvlh<u>q</u><u>x</u><u>t</u><u>q</u><u>l</u><u>x</u><u>p</u><u>l</u><u>y</u><u>m</u><u>p</u><u>x</u><u>m</u><u>h</u><u>m</u><u>r</u>

6 0
3 years ago
Write a unit rate for the situation. $1.98 for 6 bananas
USPshnik [31]
A unit rate is when you find a rate when one variable (or value) is equal to one.

Let's find the unit rate for the price of the bananas. 

1.98/6= 0.33

It is 33 cents for one banana. That is the unit rate. 

I hope this helps!
~kaikers
4 0
3 years ago
Which linear equation has a negative slope? А y = 6 в у= y = – 50 y = 2x + 5​
iris [78.8K]

Answer:

y = - 50

Step-by-step explanation:

m = slope

5 0
3 years ago
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***I NEED HELP PLEASE***
sergey [27]

Answer:

on a graph or a number line

Step-by-step explanation:

7 0
3 years ago
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