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maksim [4K]
1 year ago
9

What is the surface area of a sphere with radius 3?

Mathematics
1 answer:
DedPeter [7]1 year ago
8 0

Answer:

A≈113.1

Step-by-step explanation:

A=4πr2=4·π·32≈113.09734

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Which graph represents an exponential function?
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The graph pictured is an exponential function.
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3 years ago
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On a scale drawing inch = 1 foot. What are the dimensions on the scale for a room that is 27 feet by 20 feet?
Rufina [12.5K]
If 1 inch = 1 foot then 1 foot = 1 inch.
With this, you can make a ratio of 1 foot:1 inch, or 1:1.
Starting with the first dimension, 27 feet, just change the 1 to 27 in the ratio.
27:?
To find how many inches this is in the scale drawing, find how much 1 had to be multiplied by to get to 27. This is 27, since anything times 1 is itself.
Just multiply the other side by 27 as well to get the answer for the first dimension.
1 • 27 = 27
So 27 feet = 27 inches in the scale drawing.
Now do the same for the second dimension.
1:1
20:?
1 • 20 = 20
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The answer is that the scale drawing has dimensions of 27 inches by 20 inches if 1 inch = 1 foot is the scale
7 0
3 years ago
A website is offering a promotion, during which customers can buy up to 100 photos for a flat fee. The cost per photo varies inv
Alecsey [184]
The complete question in the attached figure

we have that
 for c=5 and n=20------------> n*c=20*5=100
 for c=2.5 and n=40------------> n*c=40*2.5=100
 for c=2 and n=50------------> n*c=50*2=100
 for c=1.25 and n=80------------> n*c=80*1.25=100

therefore
<span>the function that models the data is n*c=100
</span>
the answer is nc=100





6 0
3 years ago
The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many students are girls?
AnnyKZ [126]

Step-by-step explanation:

3+5=8

40÷8=5

5x5=25 girls

5x3=15

5 0
3 years ago
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given matrix A is 2x3 matrix, matrix C is a 2x1 matrix and A x B = C. what are the demensions of matrix B?
nikitadnepr [17]

Answer:

L×W=A 6 x 2 =12

Step-by-step explanation:

length ×weight =area example:you need to measure a full sheet pan and let's say if it is 8 full sheet pan you weighs 23 so you want to multiply 8×23=184 that is your area okay 2×3=6 and 2×1=2 so to figure out the area multiply 6×2=12 so the answer is matrix B just remember length times weight equal areas

4 0
3 years ago
Read 2 more answers
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