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DENIUS [597]
3 years ago
11

What is the surface area of s sphere with a radius of 4ft

Mathematics
1 answer:
erik [133]3 years ago
8 0
The formula you use to find the surface area of a sphere is A=4 π r^2
4×π = 12.5663706143
r = 4
4^2 = 16
12.5663706143 × 16 = 201.061929829
Final answer: the surface area is about 201 ft.
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HELP PLEASE
scoray [572]

<u>Solve the two-step equation and identify the steps.</u>

Equation:  1.4x     +     6.1     =      –7.9    

<u>Solution:   ======>     x        =       -10</u>


<u>Long  Version  from Calculation 1</u>

<u>Equation</u>

1.4x     +     6.1     =      –7.9    


<u>Steps:</u>

<u>Step 1): Multiply Both sides  by   10:</u>

1.4x  *  10     +     6.1   *   10    =      –7.9   *    10

<u>Refine:</u>

14x    +    61     =     -79

<u>Step 2): Subtract  61  from both sides:</u>

14x    +    61     -   61       =     -79     -    61

<u>Simplify:</u>

14x          =         140

<u>Divide both sides by  14:</u>

14x/14       =     -140/14

Simplify:

14x/14     =     x   =====>   14x/4

<u>Divide the numbers:</u>

14/14    =    1

=       x

-140/14    =      -10

-140/14

<u>Apply the fraction Rule:</u>

-a/b        =       - a/b

=            -140/14

<u>Divide the numbers:</u>

140/14      =        10

=            -10

<u>Answer,      Letter  Choice, (A),      x        =       -10</u>







<u>Short  Version</u> <u>From Calculator Number 2:</u>

Equation:     1.4x     +    6.1      =      -79

<u>Solution          Option   (A),       x        =     -10</u>

<u>Let's solve your equation step by step:</u>

1.4x     +      6.1       =     -7.9

<u>Step  1     Subtract   6.1    from both sides:</u>

1.4x     +    6.1     -    6.1       =      -7.9       -     6.1

1.4x         =       -14

<u>Step  2  Divide both sides by   1.4:</u>

1.4x/1.4      =          -14/1.4

x                   =          -10

<u>Answer            x        =          -10     Option   (A)</u>







Hope that helps!!!!                                   : )


4 0
3 years ago
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eton's baby sister took a nap for 2 hours and 22 minutes yesterday and 1 hour and 35 minutes today.how many minutes did she slee
Ksenya-84 [330]

2:22

-1:35

______

47 minutes

6 0
3 years ago
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What is wrong with this "proof"? "Theorem" For every positive integer n,n i =1 i = (n + 1 2 ) 2 /2. Basis Step: The formula is t
creativ13 [48]

Answer:

The basis step is not even true.

Step-by-step explanation:

The basis step would be for     n = 1.

If the basis step was true then you would have that.

\sum\limits_{i=1}^{1} i  =  \frac{(1+1/2)^2}{2}

Now. When you say

                                            \sum\limits_{i=1}^{1}  i            

That's just a fancy way of writing    1.  

On the other hand    

\frac{(1+1/2)^2}{2}  = \frac{9}{4} = 2.25

Therefore  

  1 \neq 2.25

And the basis hypothesis is false.

7 0
3 years ago
Write an equation in point slope form for each line.<br> (1,6) and (2,3)
fomenos
Two equations you can use in point slope form are:

y-6 = -3(x-1)
y-3 = -3(x-2)

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4 0
3 years ago
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Find the ordered pairs for the x- and y-intercepts of the equation 3x − 2y = 18 and select the appropriate option below.
horsena [70]
Pretty sure the answer is B
8 0
3 years ago
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