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gizmo_the_mogwai [7]
3 years ago
14

What is the surface area of sphere with radius 13 ft?

Mathematics
2 answers:
melisa1 [442]3 years ago
7 0

Answer:

Surface area of a sphere= 676\pi ft^2

Step-by-step explanation:

the surface area of sphere with radius 13 ft

Surface area of a sphere formula is 4\pi r^2

Where 'r' is the radius of the sphere

r= 13 ft

plug in the radius and find surface area

Surface area of a sphere = 4\pi (13)^2

= 4\pi *13*13

= 676\pi square feet

9966 [12]3 years ago
6 0
SA=4pir^2
SA=4pi13^2
SA=4pi169
SA=676pi ft^2
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A vegetable garden with an area of 200 square feet is to be fertilized. If the length of the garden is 1 foot less than three ti
charle [14.2K]
Ok so I like to go in steps with these questions- first draw a picture and identify your variables.

W=width
L= 3w-1

Now we know that length times width gets us area so we plug in our variables into the area equation.

200 = w(3w-1)

When you foil that equation you end up with a quadratic : 3w^2-w-200 = 0

Either factor that or use the quadratic formula to get
w= 8.33 and w= -8

Since you can't have a negative dimension you need to use 8.33 and plug it back into your length equation.

Final answer:

w= 8.33ft
l= 23.99ft

*Now I simplified the decimals a little bit so you end up with 199.8ft^2 for the area so just add a few decimals on here and there*
5 0
3 years ago
Read 2 more answers
Need help solving this problem ​
natka813 [3]

Answer:

Part 1: \frac{11-x}{5} or \frac{11}{5}-\frac{x}{5}

Part 2: \frac{9}{5}

Step-by-step explanation:

To start things off, you must put everything on the opposite side of y so that you only have the y variable left.

In this case, put x onto the other side, making it negative since it's flipped, so you get 5y=11-x (since the x is negative you're using subtraction from 11).

Next, divide both sides by 5 to make 5y into y:

\frac{5y}{5} =\frac{11}{5}-\frac{x}{5}

y=\frac{11}{5}-\frac{x}{5}

Then in this case you turn y=f(x), but the system did it for you, so all you have to put is \frac{11}{5}-\frac{x}{5}.

For the second part you must replace x with 2 since you need to find f(2).

\frac{11-2}{5}

Your answer for part 2 is \frac{9}{5}.

3 0
2 years ago
Determine whether the value is a discrete random​ variable, continuous random​ variable, or not a random variable. a. The number
Fiesta28 [93]

Answer:

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a. The number of textbook authors now sitting at a computer :

A discrete random variable

Number of authors will be an integer value.

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Continous random variable

Possible height value : h > 0

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It is not a random Variable

The response isn't numeric

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It is a continous random variable

Possible values ; amount of rain > 0

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6 0
3 years ago
Jeff is saving to purchase a new basketball that will cost at least $88. He has already saved $32. At least 7) Jeff is saving to
Mariulka [41]
The answer is 224 
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4 0
3 years ago
How can you find a place value in dicimals?
Verizon [17]
Well 1234567 is a number and
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4 is in thousand's place
3 is in ten thousand's place
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1 is in million's place


I hope I have answered it right
5 0
3 years ago
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