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olya-2409 [2.1K]
4 years ago
7

The radius of a small ball is around 4.89796 cm. the radius of a basketball is about 2.45 times larger. what is the ratio of the

surface areas of the small ball and a basketball?
Mathematics
1 answer:
expeople1 [14]4 years ago
6 0
Formula for surface area of a sphere of radius r is A = 4pi*r^2.

The same formula, for the case where the radius is 2.45 times greater, comes out to A = 4pi*[2.45r]^2.

Just find the ratio of

4pi*r^2 to 4pi*[2.45r]^2.  It is 1/6.


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lo que es 40 x 21 dividido por 8 redondeado al décimo más cercano muestra el trabajo, así que sé que no solo usaste una calculad
Mars2501 [29]

Answer:

21

*40

<u>        </u>

     0

+840

<u>         </u>

840

    105  

8\sqrt{840}        

 -80

   <u>         </u>

       40

      -40

   <u>         </u>

         0

=105

<u>8 goes into 84 ten times, 84-80 =4</u>  

<u>Bring down the zero make 40 which 8 goes into five times</u>

<u></u>

Step-by-step explanation:

cant be round because there no tenths place

<h2>TRANSLATION</h2><h2> </h2><h3>8 entra en 84 diez veces, 84-80 = 4 </h3><h3> </h3><h3>Baje el cero, haga 40, en el que 8 entra cinco veces</h3><h3 /><h3>no puede ser redondo porque no hay décimos, asegúrese de poner los números correctos</h3>
3 0
3 years ago
Jane is having difficulty deciding whether to put her savings in the Mystic Bank or in the Four Rivers Bank. Mystic offers a 12%
Ad libitum [116K]
The answer to this question would be <span>B. Mystic
</span><span>

Since the rate should be constant, option C and D wouldn't be true.</span>
If the Four Rivers bank gives 12% per year and Mystic Bank gives 14% per year, it will be 3% per quarter year for Four Rivers Bank and 7% semiannually for Mystic Bank. 
The total rate would become:
Four rivers 103%^4= 1.125
Mystic : 107%^2= 1.145

5 0
3 years ago
Help!!!! for just 3 but if you know 4 also then it’s on my page and I would appreciate the help
Rus_ich [418]
A quadratic equation is set up in the form of ax² + bx +c
First set equation = to 0
0= x² - 5x - 24
Next plug into quadratic formula( -b Plus or minus the √b²-4ac) ÷ 2a
[10 plus or minus √(25² - 4×1×24)] ÷ 2
Solve for inner parenthesis first 
√625- 96   = √529
Now set up two equations
(10 + √529) ÷2   = x   = 16.5
(10 -  √529) ÷2   = x   = -6.5 
So therefore x = 16.5 and -6.5



8 0
3 years ago
Where A = -7 and b = 9 what is the value of the midpoint?
sergey [27]

Answer:

Find the value of x if B is the midpoint of AC, AB = 2x + 9 and BC = 37

Step-by-step explanation:

8 0
3 years ago
a tea company surveyed shoppers at two different malls. shoppers were asked whether they prefer sweetened or unsweetened tea. at
FromTheMoon [43]
First, let's create the ratios of sweetened to unsweetened. To do this, you would have to subtract the number of people that preferred unsweetened from the total.
Westside mall: 15:30 or \frac{15}{30}
Eastside mall: 13:26 or \frac{13}{26}

Now, you would divide to both ratios.
15 ÷ 30 = 0.5
13 ÷ 26 = 0.5 

They have the same sum, meaning, they are the same. 

Westside Mall shoppers are just as likely to prefer unsweetened tea as Eastside Mall shoppers. 

I hope this helps!


8 0
4 years ago
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