# Posts by martin

Total # Posts: 220

arithmetic
The nth term of the sequence 4,11,18,...is167 find n

phycis
A roller coaster has two hills and starts from rest atop the first hill , which is the higher of the two hills . The secound hill increases if the height of the initial hill is increased by 20m

Chemistry
I don't understand the part when it says 100-X/X. How do you solve for X?

Chemistry
A rock contains 200. µmol 238U (t1/2 = 4.5 109 yr) and 116 µmol 206Pb. Assuming that all the 206Pb comes from decay of the 238U, estimate the rock's age. Please explain step by step.

Math
Suppose R is the relation on N where aRb means that a ends in the same digit in which b ends. Determine whether R is an equivalence relation on N. And, Suppose that R and S are equivalence relations on a set A. Prove that the R ¿ S is also an equivalence relation ...

Discrete Math
You have two decks of 26 cards. Each card in each of the two decks has a different letter of the alphabet on it. You pick at random one card from each of the two decks. A vowel is worth 3 points and a consonant is worth 0 points. Let X = the sum of the values of the two cards ...

Discrete Math
How many ways can you get a bunch of 4 books to give a friend if you have 30 books (15 novels, 10 history book and 5 math books)?

chemistry
NaOH + CH3COOH = CH3COONa + H2O calculate the mass concentration in gdm-3 of the orinigal viniger

psychology
Kevin and Cheryl had completed their first day of naturalistic observation of adolescents at the local high school. As they discussed their experiences during the day, they found that they were both concerned about the difference their presence in the classrooms made on ...

Chemistry
Thank you Dr. The former is needed to find the volume of H2 in this case. I expect that once I perform the lab, the latter will be needed. You've helped me a great deal. You may expect to see me more often. I'm in your care for this semester, amongst any other ...

Chemistry
Dr, I have another question, but first, thank you for showing me that I was on the right track. I didn't understand how the moles of HCl were distributed. I thought .02 moles of HCl meant that there were .02 moles of H and .02 moles of Cl. Now I know that HCl add up to .02...

Chemistry
How many mole of H2 will be produced if 0.500 grams of magnesium is reacted with 10.00mL of 2.0 M HCl? I've concluded the answer is 0.02 moles of H2, but I'm doubting myself a lot because I don't understand the aspects of the balanced chemical equation and how that...

Chemistry, Need Help!!
if you have 150g of nano3 how many mole are there

Physcial Science
Alpha particle tracks through gases and thin metal foils show few deflections. What does this tell us about the atom?

Physical Science
What fuel other than uranuin can be used in a nuclear reactor?

Math
Cause i wasn't really sure

Math
Is it possible to find out how long is the wall? The choices shown for the problem are: (a) 8 feet (b) 12 feet (c) 14 feet (d) 15 / 9 feet (e) None of these. Because I had put down (e) none of these.

Math
A scale drawing of an office building is not labeled but indicates 1 / 3 inch = 4 feet. On the drawing one wall measures 4 and 2 / 3 inches. How long is the wall?

Physics
What's the acceleration you're told to use in your class? 9.8m/s^2? 10m/s^2? 9.81m/s^2? I'll go with 10 because I'm lazy, just substitute to whatever you guys are using. The first ball (dropped from rest) will take 2 seconds to reach the ground : 20 = 5 x t^2 ...

Physics
x = x0 + v0*t + 1/2*a*t^2 x0=1.5 v0=-3 a=-10 (or something close, depending on what you're told to use in your class). You want the time for when x=0 (where 0m = the bottom of the window). 0 = 1.5 - 3 x t - 5 x t^2 1.5 = 3xt + 5xt^2 0=5t^2 +3t -1.5 You use the quadratic ...

Accounting
You didn't actually ask a question. Just saying.

Math
First, count the number of p and y in one pattern. Then, multiply these respective numbers by 4 because you need 4 times these patterns for one necklace. Then you multiply by 8 because you want 8 such necklaces. One pattern : y=4, p=10 One necklace : y = 4 x 4 = 16, p = 10 x 4...

algebra
variance = 4, so standard deviation = 2 (because squareroot of 4 is 2) 160 - 166 = -6 = -3 standard deviation. You take out a normal distribution table and you find out that a standard deviation of -3 or less happens only 0.13% of the time. Answer : 0.13%

algebra
230% of the distance from Boston to St. Louis = 2.3 times the distance from Boston to St. Louis With that information, you have that : 2.3 x (distance from Boston to St. Louis) = 2410 And you just divide both side of the equation by 2.3. 2410 divided by 2.3 is very close to 1048.

basic statistics for the behavioral sciences
a) 11 + 1 (you) = 12. 12/80 = 0.15 = 15% b)40% = 0.4, 0.4 x 80 = 32. c) 7.5% = 0.075, 0.075 x 80 = 6 Also, 0.5% x 80 = 0.005 x 80 = 0.4 students, which doesn't make sense.

algebra
0.82 - 0.8 = 0.02 0.02/0.01 = 2 standard deviations You check a normal distribution table (unless you were provided with the value for 2 standard deviation already) You get : Greater than 2 standard deviation = 1 - 0.9772 = 0.0228

math
At T=0, which is when we're in 1991, we want E(0)=73.7. The slope in front of T is found as follow : (76.9 - 73.7) divided by (1997-1991) = 0.53333~ = 8/15 This mean thay the life expectancy would increase by 8/15th of a year every year. In short, E(T) = 8/15 x T + 73.7 ...

Geometry
A side has 5x5=25 square feet. A box has 6 sides. 6 x 25 = 150 square feet. 4 cents per foot : 150 x 4 = 600 cents = \$6 per boxes 100 boxes : 6 x 100 = 600\$ total. Those are some costly boxes. Then again, they are very big boxes.

math

math
Just try them quickly, there's a more formal method, but it'd be much more complicated for such a simple problem. They want only even numbers. You can quickly see 10 x 12 = 120 is smaller than 224 and 18 x 20 = 360 is too big. You're left with 12 x 14, 14 x 16, etc...

math
14 and 16.

Geometry
Well, the only thing I can see "lacking" in the definition is if the intersection P is actually also one of the A,B,C,D points. So you could just say ""If line AB and line CD intersect at point P such that P is different from A, B, C or D, then angle APC ...

trig
Cot (theta) is just 1/(Tan(theta)). So we have 0.05 = 1/(Tan(theta)) And thus, by multiplying both side by Tan(theta), we have : 0.05 x Tan(theta)= 1 So Tan(theta)= 1/0.05 = 20 Tan (theta) = 20

statistics
1) 300 is two deviations of 50 away from 200, so the standard score is 2. 2) You need to look at a normal distribution for this. A quick google search should help you just fine. Or, possibly, you were provided one in class. From such a table, you can see that being two ...

algebra
PsyDAG is wrong, I believe. The odds are 1/(10,000+1) or 1/10,001.

5/90 lotto winning numbers
LOTTERY IS A MYSTERY THAT NEEDS LOT OF RESEARCH AND TOP CONNECTIONS.

Chemistry
A reaction proceeds according to the following mechanism: Cl2 ⇌ 2 Cl (fast equilibrium) Cl + H2 ⇌ H2Cl (fast equilibrium) H2Cl + Cl → 2 HCl (slow) What is the rate law for this reaction?

Chemistry
Consider the voltaic cell: Zn(s) / Zn2+(aq) // H+(aq) / H2(g) / Pt(s) Calculate the value of Ecell, in V, when [Zn2+] =1.00 M and [H+] = 0.00100 M DATA: Zn2+(aq) +2 e¯ ---> Zn(s);Eo = - 0.76 V 2 H+(aq) + 2 e¯ ---> H2(g);Eo = 0.00 V

Mat 116 Algebra 1A
7[3m-(m+2)]>-6(m+3) Use set-builder notation to describe the complete solution {m|m > ? } (type an equality symbol; then type an integer or a simplified fraction.)

Science
look at 6th grade project sites that is great place to start

comper science
write a program that accept the name of a student score obtained in 5 courses and compute the average score of the student.your program must display the name of that student on tab 5

5 of 90 lotto equation formula
I HAVE A LOTTO CHART THAT EXPLAINS IN ALL

physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50° from its original direction, and the struck ball moves off at angle 2 = 29° from the original direction (...

physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by 1 = 50° from its original direction, and the struck ball moves off at 2 = 29° from the original direction (Fig. 9-37). ...

Physics
A 10-kg duffle bag is undergoing a vertical acceleration of 0.050 m/s2 (positive for up, negative for down), while its owner is holding it with an upward force. What is the magnitude of this force?

Physics
A student applies an upward force of 58 N to a 5.1-kg physics textbook. Find the book’s acceleration (positive for up, negative for down).

physics
=4.26

math
the base of a triangle is the same as its height. what are the least whole number measurements for the triangle so that the area would be greater than 144 ft square?

math
the base of a triangle is the same as its height. what are the least whole number measurements for the triangle so that the area would be greater than 144 ft square?

CIS!!%
make a flow chart and a hierarchy chart for a small software company that need to calculate there employee pay and rate of pay with OT

biology
A gene for flower color can have multiple alleles like purple, white, or red. true or false?

biology
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)? a all white b all red c ...

write three ways to find 3x2x4

Chemistry
are molecules that are polar in nature assymetrical or symmetrical ?i think assymetrical ?

Chem
wait is it 24 moles ?

Chem
i meant 12* moles

Chem
so the answer is 2 moles ?

Chem
given the balanced equation: 2Al2O3(s)-->4Al(s)+302(g) What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ? please help me.

calculus 1
find the total area between the curves ( y= 4-x ^2 ) and the x-axis over the intervals [0,4]

calculus 1
find the total area between the curve ( y= 4-x to the second power) and the x-axis over the interval [-3,7]

5th math
How many 3,000s in 270,000

Probability help
The heights of the buildings are normally distributed. The mean of the heights is 275 feet and the standard deviation is 30 feet. A. What is the probability that the buildings height is over 280 feet? B. What is the probability that a sample of 80 buildings is gathered and the...

chemistry
URGENT!! You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution? Specify the glassware ...

English
The Great Coral Reef almost circles New Zealand and it has more marine life than anywhere else in the world.

chem - freezing point
b. What is the freezing point depression when 153 g of bromine is added to 100 g of benzene?

math 10
yes

math
The atomic number of cadium is half the atomic number of curium. Define a variable and write an expression for the atomic number of cadmium. I'm working in a group with my friends and we need help we're not the same people.

chemistry
in my opinion, since diamond cotain carbon and hydrogen atoms, it is a mixture and a homogeneous one at that matter because its components are not easily distinguished by simple observation

CIS115
I need to make a program for a small software company to calculate there empolyee pay and make a flow chart with a hierarchy chart that show loops that will allow user to continue processing employee pay until the program user want to stop. For the maximum number of employee ...

teacher aide
how children learn

Acoustics: Noise Vibration and Noise Control
Did you get any further forward with this Chris? I've got the same issues with the same question.

ARE THESE CORRECT(do they make sense to u): -he is a columnist -the remedy is working -you will receive a bonous -i don't know a reason -i bought an anniversary gift -the jewel is expensive -may i borrow an almanac -kate wants the checkersthe signature was forged thank you...

physics
If ball c slid down the hill without friction, how fast would it be traveling the instant it reached the bottom of the hill?

fractions greatest to least

riddle
Darkness

riddle
i got these hints too HINT : password has no capital letters HINT : those who know me will say 3 and those who don't 4 HINT : password=CHAR[onceeveryfouryear-11]

riddle
yes..it was written like that

riddle

riddle
could anyone please solve this riddle : I am what you cannot be but you once were what i will become i am what only blind can see and of infinity and 1 i am the sum i am the cure and i am the cancer?

math
1 x+2=3 - 10

Statistics
How do you code your data?

Statistics
How do you code your data?

Statistics
When is the Analysis of Variance or ANOVA test used?

Statistics
What is the Central Limit Theorem and how can it be used in statistics?

Statistics
I have to sample 300 persons. How do I go about doing this and how do I know that the population I have chosen has the characteristics that I am looking for?

math word problem
Case Eastern Junior College awarded 26 varsity letters in crew, 15 in swimming, and 16 in scoccer. If awards went to 46 students and only 2 lettered in all sports, how many students lettered in two of the three sports?

math
a=9b,for b the solution is b=

Macroeconomics
Which of the following aren't included in the measurement of GDP? Exports Personal income Consumption spending Government spending on goods and services Transfer payments Net interest Imports Investment spending

Chemistry
Calculate the rate at which N2O4 is formed in the following reaction at the moment in time when NO2 is being consumed at a rate of 0.0521 M/s. 2NO2(g) <-> N2O4 (g) I am not really sure how to go about this problem. rate = k (N2O4) d(NO2)/dt = -2 d(N2O4)/dt This is what I...

Hi First off, I do not know anything about US auto parts. I want to know how strong the competition is here. Who are the big players? If you have any relevant articles as well, i would be happy. Thanks in advance Martin

math
so is it 50?

math
a pasta machine costs \$33.The ingredients to make one batch of pasta cost \$.33.The same amouunt of pasta puchased at a store costs \$.99.How many batches of pasta will you have to make for the cost of the machine and ingrediants to eequal the cost of buying the same amount of ...

pre-algebra
your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression for the distance(in miles) you ...

math
um im sorry i still don't understand this

math
your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression for the distance(in miles) you ...

World History
How are the political systems of the Persian Empire and Greece alike?

World History
How are the Assyrian and Phoenician empires alike?

Social Studies
Once a group of people have settled in one location, what happens next?

health
Yes I did, there is no text in our books relating to this particular question. I have checked already.

health
What other reform efforts might be instituted to improve caregivers socialization skills?

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