Wednesday
July 23, 2014

Posts by Bob


Total # Posts: 2,412

Trigonometry
Thanks Reiny. If a question similar to this one had 4 solutions, how would you know that it had 4 answers?

Trigonometry
3csc(2X)-5=0 What are the solutions for X and how did you find them out?

Macroeconomic
1. An example of an automatic stabilizer is A. a temporary tax rebate. B. the progressive income tax.Student Response C. cost of living adjustments to social security payments. 2. Which of the following represent expansionary fiscal policy? A. an increase in average individual...

Macroeconomic
The idea that creating incentives for individuals and firms to increase productivity leading to an increase in the long-run aggregate supply curve is a. the Ricardian equivalence theorem. b. demand-side economics. c. consistent with crowding out. d. supply-side economics.

physics
A 5 m long see saw has a child whose mass is 25 kg sitting on one end. How far in meters from the center should a 70 kg adult sit on the opposite side for the see saw to balance?

Math
Graph linear inequality y<-2x + 4 y<x-4

Economic
1) GDP does not include intermediate goods because a. that would understate the true size of GDP. b. intermediate goods are not useful to consumers. c. that would count the value of intermediate goods twice. d. intermediate goods are not valuable. 2) The dollar value of an ind...

electric fields *easy
mecotes

Science-8th
how would i do C5H12 + O2 CO + H2O

Math
3x + 4y less than or equal to -12 Graph linear inequality

algebra
Find the x-intercept: f(x)=3x^2-5x-11

math
What si the volume and surface area of a triangular prism with the dimensions of a 2.5 base, 2.5 height, and 7 length

physics
A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?

physical science
A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2

chemistry
Why is it important for a company manufacturing vinegar to regularly check the molarity of its product?

college statistics
Three members of a club will be selected to serve as officers. The first person selected will be president, the second person will be vice-president and the third will be secretary/treasurer. How many ways can these officers be selected if there are 30 club members?

6th grade writting
how many paragraphs is an essay?

chem
1 molar solution of Pb(NO3)2 you want 3mL of 0.5 Molar Pb(NO3)2 how much of the one molar solution do you mix with H2O to reach your goal

Statistics - Urgent
If there were two groups: One group who saw a yardstick before estimating its length Another group who did not see a yardstick before estimating its length Would this be a matched pairs design (a person from both groups estimates at the same time, then the next pair, etc.)? Or...

Statistics - Data Collection
Specifically for a two sample t test on difference in means with a matched-pairs design. What would the step-by-step process be for a simple random sample from the cafeteria population?

Statistics - Data Collection
If you were in a cafeteria full of students and you wanted to randomly divide 10 students into group A and 10 students into group B, what would be the least biased way to do it?

science
How can an animals structure help survive in different environments? give three examples

statistics
To reduce theft, the Meredeth Company screens all its employees with a lie detector test that is known to be correct 90 percent of the time (for both guilty and innocent subjects). George Meredeth decides to fire all employees who fail the test. Suppose 5 percent of the employ...

math
No One was Not taking any of these,Because 33+13=46

posting box
That might be from loading and You may just not have the settings it needs

social studies
Republicans

all subjects
Yes I love it!!It gives me a bunch of help and it is VERY fun I spend HOURS o this.And Ms.Sue Is ALOT of help,She has Complete Answers And Gives you Websites if she has a good 1!Thanks A BUNCH Jiskha I LOVE this!

True False
False It should be "Many students anticipate spring break,But Luise looks forward to Winter vacation more."

QUICK! BE THE FOURTH PERSON TO CLICK TO WIN BIG $!
This was a HUGE waste of time

Africa
Gorillas are from there!!!! :)

english
OF COURSE!!!!!!

math
how many ways can 9 cars be parked in a row of 9 parking spaces?

chemistry
thank you very much DrBob!!I really appreciate this

chemistry
how many grams of oxygen is required to produce 2.0 kg of water??

science /chem
yup that's right

algebra
What should you say if you see a tall wrought-iron tower in paris, france?

5th grade
I am A 5th grader To.Blameless,Exculpated,and Simply Not Guilty.

calc Urgent please
idk

calc Urgent please
idk

Data Management
Oh also n is the total number of tickets which in this case is 1000000

Data Management
P(x) of 1000000 is 1/1000000 P(x) of 50000 prize is 2/1000000 P(x) of 1000 prize ia 10/1000000 P(x) of 50 prize is 200/1000000 P(x)=p Find E(x) for each one E(x)= n.p Then add all E(x) values to find the expected value of all prizes for one ticket Finally, that that total and ...

english
true but dount

Social Studies
What large city is northeast of New York City?

math
12

chemistry
A solution is prepared by mixing 0.0433 mol CH2Cl2 and 0.0623 mol CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2 are 133 and 11...

chemistry
Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 180. g of glycerin to 321 mL of H2O at 39.8°C? The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.992 g/cm3.

chemistry
Calculate the molarity and mole fraction of a 2.35 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the final volume equals the sum of the volumes of acetone and ethanol.

chemistry
Calculate the sodium ion concentration when 55.0 mL of 4.5 M sodium carbonate is added to 15.0 mL of 3.0 M sodium bicarbonate.

chemistry
What must be the pH of a solution that is 0.067 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

math
prove the following: given: ABCD is a trapezoid with bases BC and AD to prove: BX • AX = DX • CX X is the intersection of the segment going from BD and AC i need the answer in a two column proof statements Reasons 1. ABCD is a trapezoid with 1. given bases BC and AD ...

physics
In the figure below, a box of Cheerios (mass mC = 0.8 kg) and a box of Wheaties (mass mW = 2.5 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.0 N, and the magnitu...

ACCOUNTING
if a company issued $32,000,000 of 10-year, 12% bonds at an effective interest rate of 13%, receiving cash of $30,237,139 and interest on the bonds is paid semiannually how do you calculate the first semiannual interest payment and the amortization of the bond discount?

math
38 animals

physics
It emits a sound, so the equation is Intensity = Power / 4(pi)r^2 r being the distance, 158 meters.

AP Chemistry
I decided to set up an ICE chart but I am a little confused. This is what I did: CaCl2 + K2SO4 = CaSO4 + 2 KCl I 0.020M 0.20M 0 0 C -X -X +X +2X E 0.020-x 0.20-x 0+x 0+2x Am I right in saying this? Additional information: Ksp= (CaSO4)(KCl)^2 / (CaCl2)(K2SO4) Ksp= 2.4 x 10^ -5

AP Chemistry
100. mL of 0.020 M CaCl2(aq) is added to 200. mL of 0.20 M K2SO4(aq). Calculate the equilibrium concentrations of Ca^2+ (aq) and SO4^2-(aq)

Finance
Suppose you are considering two investments, stock A and stock B. The beta of A is 1.20, and the beta of B is 0.80. Stock A has an expected return of 12% and Treasury Bills are yielding 3%. If the two stocks are fairly prices, what's the expected return on the Market Index...

College Chemistry
If you have the molecular weight of ethanol which is 46.1 and the concentration is 4.0% w/v. What is the molarity

physics
Frank stands at the base of a building. He throws a 0.12kg rock straight up at a speed of 28m/s so that it rises to a maximum height of 12m above the top of the building and then falls straight down on the roof of the building. a) What is the height of the building? b) What is...

physics
A helicopter hovering above a forest fire dumps a large bucket of water. How far does the water fall during the third season?

physics
Does a free falling object have a velocity of zero? If it does then is it zero for the initial velocity or the final velocity?

Physics Gr.11
thanks!

science
does the pumping of a soap dispenser have anything to do with boyles law?

math/substituion method
x+3y=-6 3x+9y=6

Langusge Arts
what are the metaphors in here

Langusge Arts
what are the metaphors in here

English
buhgtuyrvwo6qtp28 qte87p2ety q2hye89ggggggggggggggggggggggggggggggggggggs7yu8oydu8yqo9syvqwhyuivy2qgeuyv7iqwugecuyl wgehjygtw tdgyhbwvg dguywbg sduyqw gt7yqwe utys ugsv asuyw vdb syyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyys7duiw68d6vw6ed

trig
8========)--------

trig
8========)--------

Chemistry
Assuming that sea water is a 3.5 wt % solution of NaCl in water, calculate its osmotic pressure at 20°C. The density of a 3.5% NaCl solution at 20°C is 1.023 g/mL.

Chemistry
How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol °C), and the molar ...

Chemistry
Calculate the total quantity of heat required to convert 25.0 g of liquid CCl4(l) from 25.0°C to gaseous CCl4 at 76.8°C (the normal boiling point for CCl4)? The specific heat of CCl4(l) is its heat of fusion is and its heat of vaporization is

Science
When 260. mL of 1.50 x 10-4 M hydrochloric acid is added to 125 mL of 1.75 x 10-4 M Mg(OH)2, the resulting solution will be

chemistry
We want to make 100. mL of 1.0 M NaA solution by dissolving solid NaA in water. What mass of solid NaA is needed?

9th grade geometry
take 360 divided by how many slices it was cut into for the arc of each. divide 360 by that number, multiply it by pi, than multiply it by the radius. that'll give you the area of one slice, so all you have to do now is multiply the area of one slice by 3 for all 3 slices....

math riddle algebra pizzaz
living in x aisle

geometry
i have only a measuremment for one side of a triangle need to find the other to to find area how do i do this

Calculus
How did you guys get those formulas I have the same question and I have no idea how to start it

phisics
676

chemistry
Strontium-90 has half-life of 28 years. if a 1.00-mg sample was stored for 112 years. what mass of Sr-90 would remain?

MATH
IS 8 FL OZ ONE CUP

Chemisty
7,9

Chemisty
7,9

accounting
I am attempting to study for an exam for tomorrow and cannot figure out the equity method entries up to 2006 for this problem, can someone please help! Parent Corporation owns 80% of Subsidiary Corporation’s outstanding common stock that was purchased at book...

chem lab (webwork)
the answer is NOT d!!...i just did it and got it wrong -__-

elementary math
when finding the factors for 841 what is the largest factor you would have to test?

algebra
6 over x to the 10th times x to the 17th over 15

algebra
6 over x to the 10th times x to the 17th over 51

science
The ______ of a transverse wave is the distance between 2 crests or 2 troughs.

Geography
32. Bucharest, Romania 33. Budapest, Hungary

Statistics
How do you calculate the value of z* and t* on the TI-84 and TI-89 (the number used in confidence intervals)?

Math
I know that's the first thing that comes to mind, but my teach said that it can be done. He said that the answer is $0.05, so if someone can work backwards somehow and explain to me how he arrived at that answer I would appreciate it. :)

Math
If a bottle and a stopper cost $1.10. How much does the stopper cost?

math
X= 1

reiny
Where did you get .55? I don't need the slope I don't think. This is a pretty straightforward Q, I don't need to graph it.

another word problem!
iN 1993, THE LIFE EXPECTANCY of males was 68.6 years. In 2000, it was 71.1 years. Let E represent the life expectancy in year t and t represent the number of years since 1993. The linear function E(t) that fits this data is: E(t)=_t + _ (round to the nearest tenth) Use the fun...

please help! Examples in book are different!
train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?

word problem
train A and b are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph, and B is at 60 mph. Train A passes the station at 12:25 am, and train b passes the station at 12:40 am, what time will train b catch up to train A?

math
I need help! Solve by hte elimination method: 7r-9s=-12 9r+7s=96 When I do this, I get a crazy fraction, and I know the answer is a point. (r,s) But what I'm getting is ridiculous. I got -564/130=s! That has to be totally wrong!

math
how do I solve this? I know it's common math, but I cannot remember how! -4x> 1/11 I think I multiply both sides by 11, but..... I can't remember how!

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