Thursday
July 31, 2014

Posts by leon


Total # Posts: 48

Science
So is 7 C?

Science
5.The process of desertification can occur when B.farmers use contour farming techniques C.an area of forest is clear-cut D.an area of forest is selectively cut 7.Which of the following statements describes the conservation of a natural resource? A.A factory burns coal to run ...

Help with science
So then is 7 C?

5th grade math
I'm sorry its 4 nickels, not 5 nickels. Can you check my answer again..thanks

5th grade math
I'm sorry its 4 nickels, not 5 nickels. Can you check my answer again..thanks

5th grade math
What fraction of a dollar is shown by coins (2 quarters, 1 dime, and 5 nickels)? I got 80/100 equals 8/10. Is 8/10 the correct answer? If not can you show me how to get the right answer?

math
A side of an equalateral triangle is 2/8 cm long. Draw a picture that shows the triangle. What is the perimeter of the triangle?

History
you guys are just a peacie of it spam omg you guys can get sewed and everything .l.

Math
Sam has a total of 200 dimes and quarters. If the total value of the coins is $28.10, how many quarters does he have?

statistic
I claim that I make 80% of my basketball free throws. To test my claim, you ask me to shoot 20 free throws. I make only 8 of the 20. “Aha!” you say. “Someone who makes 80% of her free throws would almost never make only 8 out of 20. So I don’t believe your...

math
write an equation in words and in symbols to represent this situation: Grace has $100.She is buying charms for her bracelet that cost $5 each.Write an equation showing the relationship between the number of charms (c)she buys and the amount of money she has left (l)<----let...

physics
A mass m1 = 6.0 kg sits on a frictionless table, and rotates at a constant speed v = 3.0 m/sin a circle of radius R = 1.5 m. m1 is attached by a massless string which passes through a hole in the centre of the table to a second m2 (which hangs freely without moving). There is ...

Chemistry
If 2 grams of acetic acid is reacted with excess 1-pentanol, what mass of pentyl acetate would you expect to achieve theoretically?

INTRODUCTION TO THE SHORT STORY, PART 1
hes right

Statistics
For each of the following (a) indicate how many factors are included, and (b) tell how many levels there are for each factor: a) 2x2 b) 2x3 c) 2x3x2 d) 4x3 e) 4x3x2x3

tusd
last year, the sports athelitic club charges 20.00 per class. 70 people attended. The club wants to increase the class price. the club expects to lose one customer for each $1.00 increase. a. what should the new price be to maximize the income? b. what is the maximum income th...

English
My parents remind us to be good people.

Maths
triangle ABC is right angled at A. AD is perpendicularto BC. If AB= 5cm,BC= 13cm and AC=12 cm.find the area of triangle ABC. Also find the length of AD.

history
i like to eat food

history
Yes.

3rd Grade Math
@ missy ; the same

Math Grade 3
amount of carbhohydrates = 27 amount of calories = 121 amunt of calorie sourses other than carbhohydrates =121 - 27 =94

java programing
Write a program that evaluates the volume and surface area of a sphere of radius 11.2cm.

java programing
If you were writing a program application that was harvesting people's emails and telephone numbers, explain and demonstrate how you would validate the individual emails and telephone numbers! That is to make sure all the emails and telephones you got were valid.

java programing
Write a program that evaluates the volume and surface area of a sphere of radius 11.2cm.

calculus
sum (n*2^n)/(2^n +3^n) [n to infinity] conv or div ? and how to get that? thank you!

calculus
The parametric curve x(t)=3cos(t) y(t)=7sin(2t) intersects itself at a point P=(x0,y0) where x0= y0= The slopes of the 2 tangents at this point are? THANK YOU!

percentage
you have 50 students one day and 70 the next what is the percentage increase

math calculus
Use implicit differentiation to find the equation of the tangent line to the curve xy^3+2xy=9 at the point (31). The equation of this tangent line can be written in the form y=mx+b where m is

phys
The space shuttle, with an initial mass M = 2.41E+6 kg, is launched from the surface of the earth with an initial net acceleration a = 26.1 m/s2. The rate of fuel consumption is R = 6.90E+3 kg/s. The shuttle reaches outer space with a velocity of vo = 4632 m/s, and a mass of M...

Economics
Ashley is currently consuming 10 hot dogs and 8 hamburgers a week. The last hot dog she consumed yielded 20utils while the last hamburger she ate gave her 25utils. If hot dogs cost $2 and hamburgers cost $2.50, is Ashley consuming the correct quantities of these two goods to b...

PHYS
A bungee jumper (m = 61.00 kg) tied to a 45.00 m cord, leaps off a 75.00 m tall bridge. He falls to 5.00 m above the water before the bungee cord pulls him back up. What is the magnitude of the impulse exerted on the bungee jumper as the cord stretches? Can anyone show me how ...

Chem
In the |Molecular Geometry Lab 1. List three ways in which models used in this experiment are inaccurate representations of orbitals? 2.explain why the ClF3 molecule is not a trigonal planar molecule?

4th grade
explain the expanded algorithm for 92x5

LINEAR ALGEBRA
How to prove or disprove (a)if A has a zeronentryonthe diagonal then A is not invertible (b)if Ais not invertible then for every matrix B, AB is not invertible (c)if A is a nonzero 2X2 matrix such that A^2+A=0, then A is invertible

pre-algebra
-W

chem
1. what is the quantum numbers of the last electron of Sb?(n= l= ml= ms=) and why the answer are this number? 2.how many electrons would be found in the n=6 level if all possible orbitals were completely filled with electrons? how to calculate this one? Thank you~

chemistry
For a TLC lab,the stationary phase is the mixture of isopropanol and ammonia or the mixture of hexane,ethyl acetate and ethanol, the stationary phase is silica gel. text some dyes and drugs. which one of the two mobile phases is the more polar? Actualy I need two pieces of evi...

chemistry
Also, for the same situation, which one of the two mobile phases is the more polar? Actualy I need two pieces of evidence... I think the polar one should be the isopropanol and ammonia because it moves slower. Can you help me come up another reason? Thank you~

chemistry
For a TLC lab,the stationary phase is the mixture of isopropanol and ammonia or the mixture of hexane,ethyl acetate and ethanol, the stationary phase is silica gel. text some dyes and drugs. what is the relationship between the polarity of molecules and the Rf values?

chemistry
it is 0.1M of acetic buffer equal to sum up of 0.05M of acetic acid and 0.05M of sodium acetic ?

nutrition
o What are some current nutritional issues, such as obesity or malnutrition for infants

Finance
if the price of milk has quadrupled (that is, grown four times) over the past 25 years, what has been the annual rate of inflation in milk price over that time period?

Finance
if the price of milk has quadrupled (that is, grown four times) over the past 25 years, what has been the annual rate of inflation in milk price over that time period?

Physics (is this right?)
yes

Physics
Consider a simple alternating current generator such as Hippolyte Pixii's dynamo. The current generated by such dynamo can be described as simple oscillating cosine signal. Assuming for simplicity that the max current generated each time a pole of Pixii's magnet passed...

Global : Columbus
Thanks, I truly believe he is a villian for what he had done to those poor innocent people. By stealing their crops, cloths, land, and making them slaves. But I know that someone had discovered the Natives before Columbus I just dont know who...... all I know is that he was Ch...

Global : Columbus
1) Why do you think Christopher Columbus is a villian? 2) Who discovered America before Columbus?

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