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  •  » Surface Area and Volume of Spheres, Cylinders, and Cones

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Topic review (newest first)

bobbym
2013-11-06 03:17:43

Hi;

That is very good. I thought you said math was you best subject?

rogerwaters
2013-11-05 23:00:29

Okay I sent in the previous lesson and I'm awaiting for the teacher's response.

Meanwhile I figured out the first 10 from the next lesson but need help with the second 10. The lesson is "The Cartesian Coordinate System and the Distance Formula" I'll wait for you to wake up and reply. Thanks again for the previous lesson! smile


Find the distance between the two points:

11. (-20, -4) and (-7, -6)

A 4
B SQRT(61)
C SQRT(290)
D 5
E SQRT(173)
F SQRT(180)


12. (1, 1) and (-4, 1)

A 4
B SQRT(61)
C SQRT(290)
D 5
E SQRT(173)
F SQRT(180)


13. (-3, 22) and (-14, 35)

A 4
B SQRT(61)
C SQRT(290)
D 5
E SQRT(173)
F SQRT(180)


14. (9, -0) and (-3, -8)

A 4
B SQRT(61)
C SQRT(290)
D 4[SQRT(13)]
E 5[SQRT(17)]
F 3[SQRT(180)]


15. (1, 2) and (5, 2)

A 4[SQRT(13)]
B SQRT(61)
C SQRT(29)
D SQRT(202)
E 4
F SQRT(60)



What is the radius of a circle with the given center C that passes through the given point Z?

16. C (0, 0); Z (-8, 0)

A 4
B SQRT(61)
C 8
D 5
E SQRT(173)
F SQRT(180)


17. C (-4, -5); Z (-10, -5)

A 4
B SQRT(202)
C SQRT(290)
D SQRT(61)
E SQRT(173)
F 6


18. C (-5, 8); Z (-5, 4)

A 4
B SQRT(61)
C SQRT(290)
D SQRT(202)
E SQRT(173)
F 6


19. C (-5, 9); Z (6, 0)

A 4
B SQRT(61)
C SQRT(290)
D SQRT(202)
E SQRT(173)
F SQRT(180)


20. C (-7, 6); Z (-13, -6)

A 4
B SQRT(202)
C SQRT(290)
D SQRT(61)
E SQRT(173)
F SQRT(180)

Never mind! I got them all and sent them in and got 20/20!

rogerwaters
2013-11-05 22:00:09

Alright, I'll do that. Thanks! I'm gonna send some questions I need help with later in the next lesson. Thanks for the help!

bobbym
2013-11-05 21:57:37

(You don't need to find actual numbers, just outline the method in step by step detail--think of all the measurements you'll need to acquire and how you'll get them.)

The problem asks for a general procedure not an analytical answer. I have provided both by coming up with the analytical answer.

I am going offline now to sleep.

rogerwaters
2013-11-05 21:54:20

Alright I'll try those. Are you sure they are correct?

bobbym
2013-11-05 21:43:42

For  the volume,



rogerwaters
2013-11-05 21:42:23

Okay that's the area. What about the volume.

bobbym
2013-11-05 21:38:03

For the surface area,









rogerwaters
2013-11-05 21:29:55

Okay but I need the steps because I can't just show the teacher that.
Can you write formula and solve it in step WRITTEN DOWN
So I could copy it.

bobbym
2013-11-05 21:23:59

Okay, the first formula is the surface area, when I plug in I get,

155.13135516116026 inches^2

The next formula is the volume I get,

162.6162806698982 inches^3

rogerwaters
2013-11-05 21:19:55

I have no idea. Math is my weakest subject and I'm really confused sad

I have no idea what's going on.

bobbym
2013-11-05 21:15:46

That is a quote. I looked it up on the internet.

The football is 5.375 inches in width so what is a?

rogerwaters
2013-11-05 21:09:54

b is (1/2) of 10.75 = 5.375 inches

May I ask how you got 10.75 inches?

bobbym
2013-11-05 21:04:52

the length, tip to tip, of MY Wilson NFL "Official Size and Weight" ball appears to be approximately 10.75 inches.

So what is b?

rogerwaters
2013-11-05 20:54:57

I'm very confused and I'm not sure what to do. Could you write the answer out for me, with showing your work?

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