Tuesday

December 6, 2016
Total # Posts: 3,670

**Foreign languages**

I left out this short paragraph. Could you please check it? 1) I really hope everthing is Ok with you. My students are really looking forward to starting the email partnership. I would be therefore be extremely grateful to you if you could let me have all the email adresses by...

*April 26, 2012*

**trig**

(sec6x+sin2x)/(sin6x-sin2x)=tan4xcot2x

*April 25, 2012*

**chemistry**

1 _____is defined as one-half of the distance between the nuclei of two adjacent metal atoms in the close packed crystal lattice ionic radius metallic radius covalent radius atomic radius 2 Except for rubidium and caesium, all common cations are smaller than all common anions ...

*April 23, 2012*

**physic**

1 A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both ...

*April 23, 2012*

**Math**

Thank you

*April 22, 2012*

**Math**

Part A Lisa has downloaded 260 songs on her mp3 player,of her260 songs, 117 are pop music. What percent of lisas songs are pop music. Part B country music makes up to 20% of lisas 260 songs. How many songs are country music .. PartA already answered I need explanation part B

*April 22, 2012*

**Math**

Part A Lisa has downloaded 260 songs on her mp3 player,of her260 songs, 117 are pop music. What percent of lisas songs are pop music. PartB. Country music makes up 20% of Lisa 260 songs. How many songs are country music.

*April 22, 2012*

**Math**

Lisa has downloaded 260 songs on her mp3 player,of her260 songs, 117 are pop music. What percent of lisas songs are pop music. Can someone explain please

*April 22, 2012*

**statistics**

Joan has j

*April 20, 2012*

**statistics**

Data from the latest census was analyzed. It was determined that one-parent households spend less on food away from home that do two-parent households. The mean amount spent by 30 one-parent households is $1876 and the standard deviation is $113. The mean amount spent by 30 ...

*April 18, 2012*

**math**

find second derivative of 30x+27.

*April 17, 2012*

**Chemistry**

How much volume (in mL) of 0.75 M K2SO4 (aq) and water must be mixed to prepare to 150.0 mL of 0.10 M K2SO4 solution? Thanks!

*April 16, 2012*

**Math**

Simplifying (4ab x (sqrt 2b)) - (3a x (sqrt18b^3)) + (7ab x (sqrt6b))

*April 14, 2012*

**Biochemistry**

In the electron transport chain, electrons from FADH2 are eventually used to reduce O2 into H2O. Experimentally, the proton motive force created by this process will generate 2 ATP molecules from ADP and Pi, using ATP synthase. From the information provided below, calculate ...

*April 10, 2012*

**Chemistry**

Hemoglobin, an oxygen-carrying protein in blood, contains 4 iron atoms per molecule and the iron comprises 0.34% of the molecules mass. What is the molecular weight of hemoglobin? Thanks!

*April 9, 2012*

**Econ**

Explain how a perfectly competitive market promotes productive efficiency (minimum average costs).

*April 9, 2012*

**chem**

If 0.208g of an unknown salt of oxalate ion requires 25mL of 0.02 M MnO4^- solution, calculate the molar mass and write the molecular formula of the unknown ( oxalare is the anion, what is the cation?).

*April 8, 2012*

**Java**

Write a program that will compute the paychecks for a small business. The business owner would like to be able to enter in an employee name, pay rate, and number of hours worked. The owner would like be able to specify the number of employees, and after all have been entered, ...

*April 7, 2012*

**Math**

Kaity draws a scalene triangle. Two sides measure 5 inches and 3 inches? Can the third side measure 3 inches? Why or why not?

*April 6, 2012*

**AP CHEMISTRY**

A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e− -> Cu(s) I2(s) + 2 e− -> 2 I−(aq) The cell is operated at 298 K with [Cu+ ] = 2.7 M and [I− ] = 2.7 M. (a) Determine E for the cell at these concentrations. (b...

*April 6, 2012*

**Pre-Calc Helppp!!!**

Find the indicated angle è. (Use either the Law of Sines or the Law of Cosines, as appropriate. Assume a = 110 and c = 136 (angle B=38) Round your answer to two decimal places.)

*April 5, 2012*

**Statistics**

Data from the latest census was analyzed. It was determined that one-parent households spend less on food away from home that do two-parent households. The mean amount spent by 30 one-parent households is $1876 and the standard deviation is $113. The mean amount spent by 30 ...

*April 4, 2012*

**Pre-Calc**

For the triangle shown, find the length AD. (Assume u = 18, v = 18, x = 10°, and y = 10°. Round your answer to two decimal places.) Show work please!!!

*April 2, 2012*

**statistics**

The U.S. Department of Agriculture claims that the mean consumption of coffee by the person in the United States is 24.2 gallons per year. A random sample of 120 people in the United States shows that the mean coffee consumption is 23.5 gallons per year with a standard ...

*April 2, 2012*

**physics**

no it would be false

*April 2, 2012*

**physics **

if a race cars velocity increases from 4 m/s to 36 m/s over a 4 s time interval, it average acceleration would be 10 m/s2.

*April 2, 2012*

** physics **

what is the average velocity of the car from 0.0s to 40.0 s

*April 2, 2012*

**finance**

Weighted Average Cost of Capital)As a member of the Finance Department of Ranch Manufacturing, your supervisor has asked you to compute the appropriate discount rate to use when evaluating the purchase of new packaging equipment for the plant. Under the assumption that the ...

*March 31, 2012*

**macroeconomics**

explin the inner and outer flows of an open system

*March 29, 2012*

**Math**

Points A and B are noted on the straight line y=2x+4.If the distance between them is 5,what is the difference between their y-coordinates?

*March 29, 2012*

**social science**

Professor Koo examined the literature on AIDS and could find nothing that examined children’s attitudes toward parents and friends with AIDS. To examine this study, Dooley should undertake a(n) a. examination of reductionism b. descriptive study c. explanatory study d. ...

*March 28, 2012*

**Transistion to College Math**

A rifle bullet is fired vertically with initial speed 490 m/s. how long does it take the bullet to reach its greatest height?

*March 28, 2012*

**computers**

I need some help with creating a simple, but automatic site status (uptime/downtime) monitor script in ColdFusion. Basically I would like the script to check if an application on my site is accessible or not every 60 minutes. If the application is down at 60 minutes, then I am...

*March 26, 2012*

**physics**

What would the equation for the drag force the ball experiences while it is moving upward at constant velocity be?

*March 24, 2012*

**math**

Simplify. (-3u)^5

*March 21, 2012*

**algebra**

how do i solve 10x+10 over 3x-6 divided by 2x+2 over 3xy-6y

*March 19, 2012*

**physics**

A 4.00-m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.500 m and mass 1.00 kg. The spool is mounted on a frictionless axle and is initially at rest. The cord is pulled from the spool with a constant acceleration of magnitude 2.86 m/s2. (a) ...

*March 19, 2012*

**statistics**

The mean life of a set of batteries in a T83 calculator is 525 with a standard deviation of 35 hours assume normal distribution is normal whats is the probability that set will last for more the 540 hrs

*March 17, 2012*

**Chemistry**

Calculate the pH after 0.011 mol NaOH is added to 1.00 L of each of the four solutions. a) 0.100 M propanoic acid (HC3H5O2, Ka= 1.3 10-5) b) 0.100 M sodium propanoate (NaC3H5O2) c)pure H2O d) 0.100 M HC3H5O2 and 0.100 M NaC3H5O2

*March 15, 2012*

**Safety**

Please help me to unscramble these 40 letters into 2 sentences that has 12 words. A A A A E E E E E E E I I I I O O U U C D F J K L L L N N N P P R S T T T T T Y . The puzzle includes some letters as follows:(use blanks from above) _ _ / _ _ f _ _ _ /_ s / _ / _ _ _ _ , / _ h ...

*March 15, 2012*

**algebra 2**

the larger of two numbers is three times the smaller number, and their difference id 34. find the two numbers.

*March 14, 2012*

**algebra**

5x + 5 = .2x + 29. I know x is 5 but what are the steps to get there?

*March 13, 2012*

**Algebra**

9 inches.

*March 12, 2012*

**algebra**

The Environmental Protection Agency (EPA) monitors air quality in U.S. cities. The function f gives the annual number of days with unhealthy air quality in Los Angeles, California, for selected years. X: 1995 1997 1999 2000 2003 f(x):113 60 56 87 88 (a) Find F(1995)and ...

*March 11, 2012*

**Statistics**

0.06

*March 10, 2012*

**HELP! College Physics**

check the related questions. The one with the 6.8m/s

*March 10, 2012*

**math**

check the related questions below

*March 10, 2012*

**chemistry**

How do I write these compounds in their "true form" or Ionic State? NaCl, CuSO4, NH4OH How do i find the charges?

*March 8, 2012*

**physics**

At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -319 J on the child. What is the child's speed at the bottom of the slide?

*March 8, 2012*

**physics**

At a playground, a 19.8 kg child plays on a slide that drops through a height of 2.13 m. The child starts at rest at the top of the slide. On the way down, the slide does a nonconservative work of -319 J on the child. What is the child's speed at the bottom of the slide?

*March 8, 2012*

**math**

THINK ITS addition of an odd number like 1+3=4 2+5=7 3+7=10 4+9=13

*March 8, 2012*

**math**

PROBABLY 3,000,000 / 5

*March 8, 2012*

**AP CHEMISTRY**

ITS a college class in high school. Im takin it in grade 12

*March 8, 2012*

**Chemistry**

I THINK ITS 1) The balanced equation is NaHCO3(s) + H+(aq)= Na+(aq) + CO2(g) + H2O(aq). Remember acid + base = salt + water. 2) 2 CaO(s) + 5 C(s) = 2 CaC2(s) + CO2(g) 3)C(s)+H2O(g)=>CO(g)+H2(g 4) CuO (s) + CO (g) Cu (s) + CO2 (g) I THINK THEY ARE RIGHT. CHECK WITH SOMEONE ...

*March 8, 2012*

**physical science**

assuming that there are no other nonconservative forces involved what was given to each car during the collision

*March 7, 2012*

**physical science**

what was the kinetic energy of each car before breaking

*March 7, 2012*

**algebra**

x^+6x+9 using the diamond and generic rectangle

*March 6, 2012*

**Chemistry**

probably right

*March 6, 2012*

**math 208**

you equation is supposed to be -8n -8 = 4 -8n=12 n=-1.5

*March 6, 2012*

**math 208**

the top answer i gave is wrng i think

*March 6, 2012*

**math 208**

aint it: -4-2n+2=4 -2n-2=4 -2n=6 n=-3

*March 6, 2012*

**algebra**

grandma ploan to finance her grandchilds college education she has 50,000 to invest use a long range investment pln ,cd,saving bond etc. the plan is to earn compound interest.the principal is(p)50,000 interest rate is (r)3.60years for investment is(6)this is time state number ...

*March 5, 2012*

**Jiskha**

wow helpin people just for free NICEEE

*March 3, 2012*

**Jiskha**

THAnX 4 tellin me!!

*March 3, 2012*

**Jiskha**

U guys answr evry question??????

*March 3, 2012*

**Chemisty**

THINK IT"S Molar mass C2H5OH = 46 g / mol 7.50 g / 46 = 0.163 moles the ratio between C6H12O6 and C2H5OH is 1 : 2 1 : 2 = x : 0.163 x = 0.0815 moles of C6H12O6 needed molar mass C6H12O6 = 180 g/mol 180 x 0.0815 = 14.7 g

*March 3, 2012*

**spanish**

Nosotros les (vender) el auto a unos chicos venezolanos. preterite form of the verb supplied

*March 2, 2012*

**geometry**

a sailboat has a sail which is shaped like a right triangle. The base of the triangle is 14 feet and the height is 20 feet. What is the area of the sail? The boat also has two smaller sails that are each half as large as the big one. How big is each of the two smaller sails?

*March 1, 2012*

**spanish**

THANX!

*February 29, 2012*

**spanish**

type the same qsn on gooooogle and the website is like the 2nd one the heading of the page on gooogle says: How can pierde be used? | SpanishDict Answers

*February 29, 2012*

**physics**

63 m

*February 29, 2012*

**statistics**

A test was given out to a class of 20 students. The highest possible score to get is 30. The mean of the tests came out to 26. One student was caught cheating and got 20 points removed from their test. what is the new mean. 28,25,24,22 ?

*February 28, 2012*

**Alg**

I THINK ITS 30/25 = x/45 x=54 burgers

*February 28, 2012*

**Aviation**

What location of CG (forward or aft center of gravity) would be the most fuel efficient? The most stable? Could you change this situation if you changed the design of the aircraft?

*February 26, 2012*

**Math**

'one angle is 4 times as large as another angle of the same triangle. the third angle o the triangle has a measure of 60 degress.' what are the measures of the other two angles in the triangle.

*February 23, 2012*

**GeOmEtRy!!!**

I THINK ITS THIS : (1/2) x (2h-4) x h = 35 (h-2)h = 35 h^2-2h-35 = 0 (h-7)(h+5) = 0 Positive solution: height = 7 inches base = 2h-4 = 2*7-4 = 10 inches

*February 23, 2012*

**Math**

Probably (x+3)(x-4)

*February 23, 2012*

**GeOmEtRy!!!**

:)

*February 23, 2012*

**GeOmEtRy!!!**

I THINK ITS 3x^2 = 75 x^2 = 25 x=+5 or x=-5

*February 23, 2012*

**math**

I THINK ITS Each number in the sequence is 9 less than the previous number.

*February 22, 2012*

**statistics**

Varsity team try out. Assume the distribution of heights to be normal w/a mean of 64inches & standard deviation of 4 inches. only 15 students passed. how many students joined the try out?

*February 22, 2012*

**statistics**

a teacher decides to fail 25% of the class.Examination marks are roughly normally distributed w/a mean of 72 & standard deviation of 6. what mark must a student make to pass?

*February 22, 2012*

**Calc**

Write the equation of the line tangent to the graph of the function at the indicated point. As a check, graph both the function and the tangent line you found to see whether it looks correct. (1/x^3 -x)^2 at x= 2

*February 21, 2012*

**calculus**

The revenue from the sale of x units of a product is represented by the following formula. R = 10(5x + 1)–1 + 70x – 11 dollars Find the marginal revenue when 50 units are sold. (Round your answer to the nearest cent.)

*February 21, 2012*

**Math**

2m+6=2m-1 bring 2m to the other side 0+6=-1 I THINK THE ANSWER IS UNDEFINED because 6cannot=-1

*February 18, 2012*

**Physics**

At the moment t=0 a particle starts moving along thr x-axis so that its velocity projection varies as vx= 35 cos pi t cm/s, where 't' is expressed in seconds. Find the distance that this particle covers during t = 2.80 s after the start.

*February 17, 2012*

**math**

I THINK ITS THIS: If each line joins just two points, and you want a line joining every pair of points, then it takes 16 * 15 / 2 = 120 lines.

*February 16, 2012*

**Math**

multiply by 2 on both sides 6x-4=8x-18 then subtract 6x to the other side -4=8x-6x-18 then add 18 to the other side -4+18=8x-6x and then simplify and then solve for x 14=2x x=7

*February 16, 2012*

**Math**

I THINK IT'S THIS: 200=5x-100-2x 200=3x-100 -2=3x -2/3=x

*February 16, 2012*

**geometry**

set it up like x/65 = 160/130 solve for x probably u shuld get 80

*February 16, 2012*

**Math**

I think its rhombus because A rhombus is a quadrilateral having the following properties.. 1.All the sides are equal 2.Opposite sides are parallel i.e it has two pairs of parallel sides. 3.Opposite angles are equal

*February 15, 2012*

**Math**

probably 3/5

*February 15, 2012*

**math**

u to

*February 15, 2012*

**math**

ohhh okay

*February 15, 2012*

**math**

i just answered it

*February 15, 2012*

**math**

dont u have a calculator or are u not allowed to use it anyway ithink its this 38/100 simplified it to 19/50 35/100 simplified it to 7/20

*February 15, 2012*

**math**

probably 55.371 work: for mixed fraction you 6and4/5 multiply5&6 and add 4 and divide it by 5 8 and 1/7 multiply7&8 and add 1and divide it by 7 you shuld get improper fractions and then turn them to decimals and multiply both of them it wuld be much easier to use a calculator

*February 15, 2012*

**math**

use long division for 7/8 and you probably shuld get .875 and then multiply it by 39 and get 34.125

*February 15, 2012*

**math**

probably: 506/27 OR in decimals 18.7407

*February 15, 2012*