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Ivenika [448]
3 years ago
7

How many square inches are in 8 square feet? brainliest if u are right.

Mathematics
1 answer:
Katen [24]3 years ago
7 0
Theres 12 inches in a foot. So 12x8=96
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Given z=4+3i evaluate z​
DerKrebs [107]

Answer:

5

Step-by-step explanation:

Assuming we want to evaluate |z|, given that, z=4+3i.

Then, by definition of modulus,

|x + yi|  =  \sqrt{ {x}^{2} +  {y}^{2}  }

|4+ 3i|  =  \sqrt{ {4}^{2} +  {3}^{2}  }

|4+ 3i|  =  \sqrt{ 16+  9 }  \\ |4+ 3i|  =  \sqrt{25 }  \\ |4+ 3i|  = 5

Therefore the modulus be of the given complex number is 5 units

5 0
3 years ago
Find the exact value of sec30°.
julsineya [31]

Decimal Form:

1.15470053

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Step-by-step explanation:

3 0
3 years ago
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What is the surface area of the sphere?
Fantom [35]

Answer:

<em>The surface area of the sphere is 314 mi².</em>

Step-by-step explanation:

According to the given diagram, the diameter of the sphere is 10 mi.

If the radius is r, then diameter =2r

So....

2r=10\\ \\ r=\frac{10}{2}= 5

<u>Formula for the surface area of a sphere</u>:  A_{S}= 4\pi r^2

Plugging the value of r into this formula, we will get...

A_{S}=4\pi(5)^2\\ \\ A_{S}=4\pi(25)\\ \\ A_{S}=4(3.14)(25)\ \ [Using\ \pi=3.14]\\ \\ A_{S}=314

So, the surface area of the sphere is 314 mi².

7 0
3 years ago
How do you substitute the equation x=y-1
umka2103 [35]
If you need to substitute the equation x = y - 1.
If you have another equation, then you would plug in y - 1 into the x value of the equation you would need to substitute into. 

Hope this helps
7 0
3 years ago
Find the exact solution to the equation below 5^(9-3x)= 125
Troyanec [42]
X=2 because 5^3=125 and there you are
7 0
3 years ago
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