Mathematics - 12 August 2007

Given 2 cylinders with :
ratio of the
circumference - 3/4
Lateral Face - 9/16
the diameter of the base - 3/4
volume - 27/64

a. If the Surface Area of the small cylinder is 243cm^3, what's the Surface Area of the larger cylinder?

b. If the volume of the larger is 144cm^3, wat's the volume of the smaller cylinder?

I can't seem to solve this so pls help me by giving me ur solution. that can rili help me a lot. Thank you guys!

2007-08-12 23:21:38 · 3 answers · asked by double B 2

2007-08-12 23:20:29 · 3 answers · asked by Anonymous

2007-08-12 23:17:43 · 14 answers · asked by Melissa 2

(iz3,0)^401.

find all the roots of the equation z^3 + 1=0. give your answer in exponential and algebraic form.

2007-08-12 23:07:36 · 5 answers · asked by Amrinder J 1

2007-08-12 22:30:52 · 8 answers · asked by Melissa 2

Let's say the average height of people is 150cm, with a std dev of 20cm, and their heights are normally distributed. Now if I group these people randomly in groups of 6 people, and I just take the height of the shortest person in each group. What is the mean and std dev of these shortest people?

2007-08-12 21:27:38 · 4 answers · asked by peaceharris 2

2007-08-12 21:25:16 · 4 answers · asked by amelia s 1

I invested my savings of $40 in the bank for a year.

The bank offered to pay me interest of 8.5% at the end of the year. How much total money did I receive back from the Bank at the end of the year?

2007-08-12 21:22:01 · 7 answers · asked by NERDface 1

Here is whole question:

In the year 65BC Marcus was half as old as Jules.

Thirty-six years later, the age of Marcus was three-quarters

the age of Jules. In what year was Marcus born?

2007-08-12 21:20:26 · 6 answers · asked by NERDface 1

2007-08-12 21:01:29 · 5 answers · asked by Anonymous

i really need this question answered

2007-08-12 20:45:15 · 21 answers · asked by Anonymous

1.)6x – 0.09 = 5(x – 0.07)

2.) If the sales tax rate is 3% and the tax on a purchase is $30, what was the amount of the purchase?

2007-08-12 20:29:48 · 9 answers · asked by Anonymous

I think it is 29 Please show how you would do it

2007-08-12 20:24:02 · 4 answers · asked by Anonymous

Translate the following statement into an algebraic equaion. Let x represent the number.

1 less than a number is 18

would it be x-1=18

2007-08-12 20:18:25 · 10 answers · asked by Yep it's me 2

Can someone help me with these word problems? :-/ Just step by step, because I really don't get it... >_< They're both similar.

1.) A pulley is rotating 320/min. Through how many degrees does a point on the edge of the pulley move in 2/3 sec?

2.) The propeller of a speedboat rotates 650/min. Through how many degrees will a point on the edge of the propeller rotate in 2.4 sec?

2007-08-12 20:15:38 · 6 answers · asked by Anonymous

THIS is really a stupid question but help me out.

I won a bid on ebay and the shoes are 16.50.
When I Check Out to pay for it, the seller requires me to add another 3% to pay the Paypal fees.

Please answer what is 3% of 16.50$ and put it in actual dollar value. PLEASE AND THANK YOU!

2007-08-12 20:03:54 · 6 answers · asked by booyouwhore 2

My teacher has a sort of humor about him....

Upon completion of an AP Calculus Summer assignment, a group of disgruntled students chase their instructor to the top of a tower. They proceed to drop the evil math teacher from the tower. The position function (in feet) of the falling teacher at time t seconds is given by:
s(t)=-16t^2+128.
The velocity of the falling teacher at time t = a seconds is given by :
lim .. s(a) - s(t)
t->a ...... a - t
Find the velocity of the teacher when t = 2 seconds.

Help would be appreciated.

2007-08-12 19:28:36 · 8 answers · asked by Tyler M 1

I can't believe I forgot this but.. please help

In basketball, I took 75 freethrows on a 10 foot hoop and I made 56, what is the percent of how many I made and how do you figure it out?

is it 75 x 0.56?

2007-08-12 19:03:29 · 6 answers · asked by Anonymous

a circle has a circumference of 185mm. find the area of the sector cut off by an angle of pi/5 subtended at the centre

2007-08-12 19:02:57 · 8 answers · asked by loza 2

2007-08-12 18:53:11 · 11 answers · asked by Anonymous

In triangle DFG, angle G is a right angle and tan angle D = 5/7. What is the cos of angle F to the nearest thousandths?

In triangle RST, angle T is a right angle and cos of angle R =4/9. To the nearest thousandth, find the cos of angle S?

2007-08-12 18:51:07 · 5 answers · asked by Anonymous

After 5 hours of house painting,Peter asked the assistance of James.Together they finished the job in 4 more hours.Had James painted in an hour after Peter started working,the job would have been finished in 7 hours.How long would it take Peter to paint the house alone?

2007-08-12 18:28:12 · 4 answers · asked by leon 1

In trianlge ABC, angle A= 30, angle B= 60,
and BC = 4. What is the length of AC to the nearest hundredth?

If the length of an altitude of an equilater triangle is 5 root three, then the lenght of a side is
a) 4 b) 5 c) 5 root 3 d) 10 e) 10 root 3

2007-08-12 18:27:54 · 3 answers · asked by Anonymous

2007-08-12 18:23:35 · 12 answers · asked by Healy2006 2

The base of a triangle is 17. The other two sides are integers and one of the sides is twice as long as the other. What is the longest possible length of a side of the triangle?
a) 17 b) 32 c) 33 d) 35 e) longest side can be any length.

If the sides of a regular pentagon are extended through the vertices. then the plane will be divided into how many nonoverlapping regions?
a) 6 b) 1 c) 13 d) 15 e) 16

2007-08-12 17:42:01 · 6 answers · asked by Anonymous

werwfsdf2wtdfdw24ttwer

2007-08-12 17:38:00 · 7 answers · asked by AJ 2

Algebra I question. This would help so much

I need the process not just the answer.

thanks so much.

2007-08-12 17:37:33 · 6 answers · asked by Emily D 1

Yahoo Answers is great. But it's obvious people simply post their homework problems here. So, I guess I have several questions regarding the helping responsibility (Note: I'm a math major myself).

1) How do we help people with problems in areas like trig and algebra, while guiding them to the correct resources for later information?
2) How do we help people in more advance courses with very specific problems in fields? Obviously this becomes an ethical issue. The web has some good advance math resources, but not always for specific types of problems. I believe we should be able to help people some way, but we need to be able to help in a way for both the person to learn, and not overstep the boundaries of the student's responsibility.

Any general comments or discussion on this issue would be appreciated!

2007-08-12 17:25:19 · 12 answers · asked by the_very_smart_guy 2

2007-08-12 17:19:42 · 5 answers · asked by lala haha gaga mama 2

I actually have a few.

Solve by completing the square. Give both real and imaginary roots. Be sure not to lose or gain roots.

22) (2x+1)(4x-3)= 3(4x-3)^2
26) (r)/(r-1)-(r)/(r+1)= (2)/(r^2-1)
28) (x+2)/(x^2-x-6)= 3-(4)/(x-3)
30) *rad*2x+5*end rad*=x+1

I appreciate any help that anyone can give me. I know it' won't be easy. :S Why else would I be asking?
KH

2007-08-12 17:19:42 · 3 answers · asked by horsefeathers90 2