Science & Mathematics - 12 December 2006

Some types of worms have a remarkable capacity to live without moisture. The table shows the number of worms y surviving after x days in one study.

X (days) 0 20 40 80 120 160
Y (worms) 50 48 45 36 20 3

(A) Find a quadratic function in the form
f(x) = a(x-h)^2 + K that models these data.

(B) Solve the quadratic equation f(x) = 0. Do both solutions have real meaning? Explain

2006-12-12 12:50:00 · 1 answers · asked by laker19 1 in Mathematics

solve please:
Jennifer is going to build a sandbox for her little brother Mickey. The dimensions are 9 feet long, 6 feet wide, and 3 feet high. They want to fill 2/3 of the box with sand. If sand is sold by the cubic yard, how many cubic yards of sand will they need?
( 1 cubic yard = 27 cubic feet.)
please answer and explain in words HOW you solved it.
thnkss!!!

2006-12-12 12:49:48 · 5 answers · asked by Min 1 in Mathematics

What factors influence the withstand voltage of a capacitor?

2006-12-12 12:49:40 · 4 answers · asked by Jackson K 1 in Engineering

what is a plant cell do? And what the basic thing you need to do about it?

2006-12-12 12:49:25 · 2 answers · asked by pincher20 1 in Biology

How do i solve

(2(root)7 - 3(root)5)x((root)7 - (root)5)

thanks

2006-12-12 12:49:24 · 2 answers · asked by pyrogrl1342 1 in Mathematics

2006-12-12 12:48:00 · 4 answers · asked by Pal G 2 in Botany

2006-12-12 12:47:56 · 1 answers · asked by slim g 1 in Chemistry

2006-12-12 12:47:55 · 1 answers · asked by lil_porky69 1 in Physics

plz help!!!!!!

2006-12-12 12:47:53 · 7 answers · asked by ThisHotty 1 in Geography

50.0 mL of oxygen gas are mixed with 80.0 mL of hydrogen gas and ignited. Which of these two gases is in excess? What volume of the gas remains after the reaction?

2006-12-12 12:47:48 · 4 answers · asked by untilyoucamealong04 3 in Chemistry

2006-12-12 12:47:44 · 9 answers · asked by alfonso p 2 in Astronomy & Space

what is a plant cell do? And what the basic thing you need to do about it?

2006-12-12 12:47:42 · 1 answers · asked by pincher20 1 in Biology

FIND THE GCF AND LCM FOR THE FOLLOWING
1) -14,28
2) 36,45
3) -28,32

PLEASE ALSO EXPLAIN HOW TO FIND THE GCF AND LCM FOR SOMETHING THAT HAS A NEGATIVE. I.E PROBLEMS 1 &3

2006-12-12 12:47:06 · 2 answers · asked by Red 1 in Mathematics

2006-12-12 12:46:06 · 5 answers · asked by thedrive 1 in Astronomy & Space

2006-12-12 12:45:42 · 11 answers · asked by Jonay 3 in Biology

It says that two polynomials are relatively prime if they have no common factors other than constants and to tell which pairs are relatively prime:
7a, a
5x, x^2
2p^2 + 2, 2p
3a^2 - a, a^3 - 2a

I really don't get it. i tried but i really need help

2006-12-12 12:44:56 · 3 answers · asked by Sarah S 3 in Mathematics

2006-12-12 12:43:28 · 5 answers · asked by Nabutso 2 in Mathematics

ln(P^2)/(0.703atm)= -2.23126. How do you solve this equation using the graphing calculator TI-83+; the "LN" Button.

2006-12-12 12:42:45 · 1 answers · asked by ==== 3 in Mathematics

how did the movie show genetic engineering
embryo

2006-12-12 12:42:32 · 4 answers · asked by Katy W. 1 in Biology

Find the x- and y-intercepts of the following equation.

-6x + 3y = -9

2006-12-12 12:42:29 · 11 answers · asked by Anonymous in Mathematics

2006-12-12 12:41:23 · 8 answers · asked by *babygurl* 1 in Medicine

2006-12-12 12:40:06 · 4 answers · asked by Alexis S 1 in Botany

I need help with this problem:

Oxygen used in repiratory therapy is stored at room temperature under a pressure of 150 atm in gas cylinders with a volume of 60.0 L

If the oxygen flow to the patient is adjusted to 8.00 L/ min, at room temp and 750.0 mmHg, how long will the tank of gas last?

Thanks in advance!!!

2006-12-12 12:39:47 · 1 answers · asked by Mia16 3 in Chemistry

Who would win?

2006-12-12 12:38:10 · 5 answers · asked by ilm03 2 in Zoology

-3xy⁴
———
15x³y³

2006-12-12 12:37:37 · 11 answers · asked by Foxglove 2 in Mathematics

2006-12-12 12:36:37 · 1 answers · asked by Anonymous in Biology

it is saying its 4.6 billion years old and said later on(thousands,milloins or billoins of years maybe) it will get to hot for life on earth then explode later on (^"ditto"^).but when is too hot and when is explode?

2006-12-12 12:36:18 · 9 answers · asked by spinitmaster 1 in Astronomy & Space

Sean thought he had $27 in his checking account and wrote a check for $12 to buy a new CD. On the way home, Sean remembered that he had withdrawn $20 from the atm the before. What is the minimum amount SEan must quickly deposit in hi account to avoid a bank service charge for insufficient funds? show your work and tell in words how you solved the problem and the steps you did to solve the problem. be sure to label your answer.

2006-12-12 12:35:16 · 9 answers · asked by Anonymous in Mathematics

Hey! I need help simplifying this expression:

(2a^-4b^2)^3/4a^-2b^-1

Thanks!

It's urgent! I have no idea where to begin!

2006-12-12 12:35:15 · 2 answers · asked by abe_cooldude 1 in Mathematics

Is it the slope of a certain material?
Or when you have a pile of material on a horizontal surface, the angle between the edge of the pile and the horizontal surface is know as the angle of repose? Is this tru

2006-12-12 12:34:30 · 0 answers · asked by babyghurl_4u 1 in Earth Sciences & Geology