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serg [7]
2 years ago
13

S=πr^2+πrlsolve for l

Advanced Placement (AP)
1 answer:
Viefleur [7K]2 years ago
4 0

Answer:Formula for surface area of a cone: S=πrl + πr^2. Solve for l. Then find l when S=283cm^2 and r =5cm.

Explanation:

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I remember well the remark made to me once by one of my teachers—and a very good teacher, too, who nevertheless did not see what
EastWind [94]

Answer:

¿Puedes hablar español porque no puedo leer las palabras en inglés?

Explanation:

8 0
3 years ago
Surface Area of a can is 517.8 cm^2. Maximize the volume of this can using the measured surface area.
mafiozo [28]

Answer:

r = 5.24 --- Radius

h = 10.48 --- Height

Explanation:

Given

Object: Can (Cylinder)

Surface\ Area = 517.8cm^2

Required

Maximize the volume

The surface area is:

S.A = 2\pi r^2 + 2\pi rh

Substitute 517.8 for S.A

517.8 = 2\pi r^2 + 2\pi rh

Divide through by 2

258.9 = \pi r^2 + \pi rh

Factorize:

258.9 = \pi r(r + h)

Divide through by \pi r

\frac{258.9}{\pi r} = r + h

Make h the subject

h = \frac{258.9}{\pi r} - r --- (1)

Volume (V) is calculated as:

V = \pi r^2h

Substitute (1) for h

V = \pi r^2(\frac{258.9}{\pi r} - r)

Open Bracket

V = 258.9r - \pi r^3

Differentiate V

V' = 258.9 - 3\pi r^2

Set V' to 0

0 = 258.9 - 3\pi r^2

Collect Like Terms

3\pi r^2 = 258.9

Divide through by 3

\pi r^2 = 86.3

Divide through by \pi

r^2 = \frac{86.3}{\pi}

r^2 = \frac{86.3*7}{22}

r^2 = \frac{604.1}{22}

Take square root of both sides

r = \sqrt{\frac{604.1}{22}

r = 5.24

Recall that:

h = \frac{258.9}{\pi r} - r

Substitute 5.24 for r

h = \frac{258.9}{\pi * 5.24} - 5.24

h = \frac{258.9*7}{22 * 5.24} - 5.24

h = \frac{1812.3}{115.28} - 5.24

h = 15.72 - 5.24

h = 10.48

Hence, the dimension that maximize the volume is:

r = 5.24 --- Radius

h = 10.48 --- Height

7 0
3 years ago
If you co-sign for a friend's credit card, what is the danger to you if your friend fails to pay? A. You might get secured credi
NemiM [27]

Answer:

either B or C.. but I'm really strong on B sorry if im wrong this is just my opinion

Explanation:

I think the answer would be B because if you co-sign and that person don't pay their part.. it falls on you because toy are the second party and the co-signer

but I also think it would be C a little too because if that person not paying they part it could put a dent in yours credit score because y'all co-signed together

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3 years ago
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The spread use of chop sticks into southeast asian countries with the influx of chinese migrants there is an example of which of
Morgarella [4.7K]
It is C, acculturation
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2 years ago
I have 103 points should i juss give them all away?
RoseWind [281]

Answer:

OK give all the points away

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2 years ago
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