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Ghella [55]
3 years ago
10

PLZ HELP ASAP SOLID GEOMETRY WITH WORD PROBLEMS

Mathematics
2 answers:
olasank [31]3 years ago
6 0
Surface Area of a Cylinder is given by: 
A = 2πrh + 2π(r^2)

Substituting;
A= 2(π)(3)(8) + 2π(3^2)
<u>A=</u><span><u>207.34512</u></span>
Scilla [17]3 years ago
3 0
The surface area of a cylinder is given by:
 A = 2 * pi * r * (r + h)
 Where,
 r: radio
 h: height
 Substituting values:
 A = 2 * pi * 3 * (3 + 8)
 Rewriting:
 A = 2 * pi * 3 * (11)
 A = 66pi square units
 Answer:
 
A = 66pi square units
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Prove that an = 4^n + 2(-1)^nis the solution to
olga nikolaevna [1]

Answer:

See proof below

Step-by-step explanation:

We have to verify that if we substitute a_n=4^n+2(-1)^n in the equation a_n=3a_{n-1}+4a_{n-2} the equality is true.

Let's substitute first in the right hand side:

3a_{n-1}+4a_{n-2}=3(4^{n-1}+2(-1)^{n-1})+4(4^{n-2}+2(-1)^{n-2})

Now we use the distributive laws. Also, note that (-1)^{n-1}=\frac{1}{-1}(-1)^n=(-1)(-1)^{n} (this also works when the power is n-2).

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=3(4^{n-1})+(-1)(6)(-1)^{n}+4^{n-1}+(-1)^2(8)(-1)^{n}

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4 0
3 years ago
There are two water tanks, Tank #1 fills into Tank #2.
cricket20 [7]

Answer:

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If the volume in tank 2 is increasing at 2 gallons per minute, it will increase by 70 gallons from 60 gallons to 130 gallons in 70/2 = 35 minutes.

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3 years ago
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