Science & Mathematics - 1 October 2007

Hi all, I need help understanding how to graph sin waves.
An example problem is:

A lemonade stand sells a lot of drinks in the sumer and not very many in the winter. The best day of the year was August 10th (215th day), when 150 glasses were sold. The worst day was February 10th (41th day), when 40glasses were sold.

a) give the Domain, Range, and period of the situation above

b) Write an equation for a sine function that has been "danced" to fit the situation above [simplify]

c) use the equation from part b to find the # of glasses sold on June 1 (154th day)

d) write an equation for a cosine function that has been "danced' [simplified] to fit the situation above. Explain the similarities and differences between this cosine function and the sine function from part b




For (A), I got Domain to be all reals, and Range to be [40,150]. How do I solve for period?


How do I go about solving the rest of this from there? Thanks in advance for helping me understand this concept!

2007-10-01 14:41:40 · 2 answers · asked by rommelyisunsin 1 in Mathematics

How many millimeters are there in 1 m?
How many centimeters are there in 1 m?

PLEASE HELP!!!!!
Best answers get 10 points.

2007-10-01 14:40:42 · 6 answers · asked by Anonymous in Mathematics

A block of mass 500. g is sliding on a rough surface with an initial speed of 1.4 m/s. It comes to a rest after a time of 0.70 s. What is the coefficient of kinetic friction

2007-10-01 14:38:34 · 5 answers · asked by Anonymous in Physics

HC2H3O2 + NaOH ---> ???

2007-10-01 14:33:37 · 6 answers · asked by sally 2 in Chemistry

I am doing a study on different cycles in Earth Science. I would appreciate anyone that will fill out the question below. It will be contributed to my studies. Thanks.

When you look out the window, do you see water, sky, rocks, or trees? Describe two cycles happening right outside your window. Be sure to identify the substances being cycled.

2007-10-01 14:27:41 · 1 answers · asked by John Garrington 2 in Earth Sciences & Geology

how do i figure out how many electrons and neutrons are in an element

2007-10-01 14:27:25 · 2 answers · asked by corndog 1 in Chemistry

how do i figure out how many electrons and neutrons are in an element

2007-10-01 14:27:04 · 2 answers · asked by corndog 1 in Chemistry

i don't know what i'm doing wrong here...
{int from 2 to 8} -2/((x-4)^2)dx

i solved the integration as 2/x-4

plug in 8 and get 1/2
plug in 2 and get -1

1/2 - -1 = -1/2

what am i doing wrong here? someone please help!

2007-10-01 14:26:07 · 3 answers · asked by Alysse 1 in Mathematics

Hi, im in high school right now and i want to be a surgeon when i grow up but im wearing glasses. Will waring glasses decrease my chance of becoming a surgeon?Btw, is it hard becoming a surgeon?

2007-10-01 14:23:50 · 7 answers · asked by Anonymous in Medicine

2007-10-01 14:21:47 · 2 answers · asked by soul1er 1 in Chemistry

more than Brian. How many does each of them has?

Please, plase help me. Showing the work would be even great!!

2007-10-01 14:21:19 · 18 answers · asked by erikck 2 in Mathematics

2007-10-01 14:19:10 · 1 answers · asked by Anonymous in Chemistry

please show work

2007-10-01 14:18:09 · 2 answers · asked by Anonymous in Chemistry

If you know anything about the Drake Equation, please share your knowledge. If you've heard of any scientific theories (NOT YOUR OWN =P) that are relative to this topic, please share those too. I have to do a presentation on this, so it'd be nice if I knew what I was talking about. Are there any sites you can provide that would help? Thanks!

-Kay

2007-10-01 14:15:52 · 5 answers · asked by Kay Jay 1 in Astronomy & Space

2007-10-01 14:14:42 · 2 answers · asked by Anonymous in Chemistry

2007-10-01 14:13:52 · 5 answers · asked by Randy B 1 in Astronomy & Space

A woman rides on a Ferris wheel of radius 16 that maintains the same speed throughout its motion. To better understand physics, she takes along a digital bathroom scale (with memory) and sits on it. When she gets off the ride, she uploads the scale readings to a computer and creates a graph of scale reading versus time. Note that the graph has a minimum value of 510 and a maximum value of 666 .

2007-10-01 14:11:24 · 1 answers · asked by smart-crazy 4 in Physics

to the book of Genniess

2007-10-01 14:11:21 · 7 answers · asked by claudius4804 1 in Astronomy & Space

Na2O
CaCl2
Cl2O
CsCl
Al2O3

2007-10-01 14:10:14 · 3 answers · asked by Jeff W 1 in Chemistry

BaOH + HF --> ___ + ___

What is the name of this reaction?

A) single displacement
B) dehydration synthesis
C) acid base
D) decomposition



Which agent will give up the hydrogen ion?

2007-10-01 14:09:30 · 3 answers · asked by Anonymous in Chemistry

It would be far more safer, and the amount of cargo coming and going would be limitless.

Though where would be the best place to build it? Australia? Perhaps because its the most geologically stable land mass?

2007-10-01 14:08:49 · 7 answers · asked by somber_pieces 6 in Astronomy & Space

I personally think that there is life elsewhere...i mean i can't really believe that we are alone in this universe....What do u think?

2007-10-01 14:08:15 · 12 answers · asked by Storm 3 in Astronomy & Space

A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.987 m (3.24 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

2007-10-01 14:07:01 · 2 answers · asked by sumanth s 1 in Physics

How many grams of H2 will be produced when 1.00 g of Mg is added to a
250. mL sample of 0.500 M HCl?
Mg+2HCl--->MgCl2+H2

2007-10-01 14:06:50 · 1 answers · asked by confusedkid 3 in Chemistry

what is formed between 1-pentanol + acetic acid?

2007-10-01 14:06:42 · 2 answers · asked by Anonymous in Chemistry

2007-10-01 14:05:36 · 2 answers · asked by kountry_kandi 2 in Mathematics

2007-10-01 14:04:49 · 2 answers · asked by Amy K 5 in Engineering

Need answer quick!!!!!!!! It's due tomorrow!!!!!!

2007-10-01 14:04:34 · 3 answers · asked by Anonymous in Agriculture

2007-10-01 14:04:06 · 2 answers · asked by Anonymous in Mathematics

I need to know the answer quick!!! Its due tomorrow!!!!!!1

2007-10-01 14:02:51 · 2 answers · asked by Anonymous in Agriculture