Thursday
December 18, 2014

Posts by will


Total # Posts: 388

P.E. help please
45% of 10 is 4.5 So the answer is c Multiply your answer by 10 and the number your trying to get the % from by 10 as well 10x10=100 4.5x10=45 Percent is a calculation of part of 100. And in this case you make the "10" a 100 by multiplying it by 10
December 3, 2014

statistics
Well if of 100 students there is 70 boys, and only 70% of the boys are in sports, all you need to do is find 70% of 70. Which is 49. 70 x 0.07= 4.9 4.9x10=49
December 3, 2014

Chemistry
If a solution contains 0.65mol of OH−, how many moles of H+ would be required to reach the equivalence point in a titration?
November 16, 2014

math
a man 5 ft tall casts a shadow of 6 ft. The angle of elevation f the sun is?
November 15, 2014

Physics
A puck of mass 0.165 kg, initially resting on ice, is hit by a stick to gain a speed of 32.0 m/s and then slides 25.0 m to lose 5.00% of its kinetic energy. (a) What is the work done on the puck by the stick? (b) What is the kinetic friction coefficient between the ice and puck?
October 11, 2014

Business math
Order for 620 dresses from China, cost is $40 a gown, markup based on selling is 76%, what is the selling price of each gown?
September 26, 2014

Chemistry
1 ersk * ( 100 ed / 12 ersk ) * ( 10 ebb / 9.5 ed ) * ( 1 zum / 5 ebbs) Calculate it yourself
September 22, 2014

algebra
If only natural gas is hit, the income will be $140,000. If nothing is hit, there will be no income. If the probability of hitting oil is 1/40 and if the probability of hitting gas is 1/20, what is the expectation for the drilling company?
September 10, 2014

physics
A rifle with a muzzle velocity of 480 m/s shoots a bullet at a target 45.6 m away. How high above the target must the rifle barrel be pointed to ensure that the bullet will hit the target? Neglect air resistance.
September 7, 2014

chemistry
Nevermind, I did it, I should be paying you for all this help ;) I had to take other pk 2.35+log10(102) =4.35
August 26, 2014

chemistry
9.78+log10(1/102) =7.77 sounds good?
August 26, 2014

chemistry
thank you I'm looking into this albeit totally lost atm
August 26, 2014

chemistry
glycine and lysine, have the following values of the relevant acid dissociation constants (pKa) glycine, pKa=2.35 lysine,pKa=10.79 For an aqueous solution of glycine alone, calculate the value of pH at which the ratio of the concentration of neutral glycine zwitterions to the ...
August 26, 2014

Chemistry Help!!!!!!!!!!!!!!
a) Carbon [He]2s²p² b) Silicon [Ne]3s²p² Hund rule -> fill from bottom to top Pauli -> first you fill orbitals with one spin and then the other ex. if you have 4 electrons in p orbitals P 11 1 1 __ __ __ p.s. if they don't delete this too
August 26, 2014

chemistry
got it! ka= 3.26*10^-3 so pKa=2.49 tnx
August 26, 2014

chemistry
A 1.11 M solution of fluoroacetic acid, FCH2CO2H, is 5% dissociated in water. Calculate the value of the pKa of FCH2CO2H. pKa: ?? I dn't even know how to strt with this
August 26, 2014

chemistry
what image? degree of polymerization is like this propylene is H2C=CH-CH3 so 3C and 6C molec. weigth (12*3)+6 = 42 g/mol n = 3.091*10^5 / 42 = 7359.52
August 25, 2014

chemistry
it's ok, that's 372 nm it's uv I got same result
August 24, 2014

chemistry
volts and eV aren't like "multiples" eV is an energy, V a potential taht's V and it's checked correct ;)
August 24, 2014

chemistry
Determine the potential (V) by which a proton must be accelerated so as to assume a particle wavelength of 0.0293 nm. ---- This is what I did, dunno if right - wavelength in meters = 2.93*10^-11 m - used DeBroglie relation to find energy lambda = h / mv, v from kinetic energy...
August 24, 2014

chemistry
Calculate the wavelength (in m) of a photon capable of exciting an electron in Li2+ from the state n= 3 to the state n=5
August 24, 2014

chemistry
Thank you!
August 24, 2014

chemistry
a) Calculate the number of moles of nitrogen dioxide, NO2, that could be prepared from 79.0 mol of nitrogen oxide and 82.0 mol of oxygen. 2NO(g)+O2(g)⟶ 2NO2(g) b) Identify the limiting reagent and the excess reagent in the reaction. What would happen to the potential ...
August 24, 2014

chemistry
Reaction is second order, even if your plot of 1/T doesn't give a perfectly straigth line. a) 2 b) 0.71 my reagrds to will
July 26, 2014

Chemistry
A compound of chlorine and fluorine, ClFn, reacts at about 75oC with uranium metal to produce uranium hexafluoride, UF6 and chlorine monofluoride, ClF (g). A quantity of uranium produced 3.53g UF6 and 343 mL ClF at 75oC and 2.50 atm. What is the formula (n) of the compound?
May 26, 2014

Math
Nina walked 15 yards to Paul's house. They then went hiking. Which rule shows how many yards Nina walks for every yard Paul walks? a. p=n+15 b. n=p+15 c. P=15-n d. n=p-15
March 20, 2014

physics
An X-ray tube used for cancer therapy operates at 4.04 MV with a beam current of 23.4 mA striking a metal target. Calculate the power of this beam.
February 12, 2014

algebra
x^3+4a+5a^2x^6 ascending order
February 9, 2014

Algebra
7. Paula is an office manager for ABC Advertising. She has been tasked with finding a copy machine that falls within a budget of $750 per month. She finds a company that will lease the machine for $275 a month. Each copy costs 4¢ and a ream of 500 sheets of paper costs $5...
February 2, 2014

Algebra
1. A firm pays $1.75 for each copy of a magazine and sells each one for $2.50. There is a fixed monthly cost of $40 for printing the publication. If the firm wants to make $550 dollars next month, how many magazines do they have to sell?
February 2, 2014

Introductory to algebra
simplify both sides of the following equations as much as possible and the solve: 4x+2-3x=4+1
January 20, 2014

Biology
Could someone please explain Endocytosis(phagocytosis, pinocytosis and receptor-mediated endocytosis) in simplest way? I do not understand
October 23, 2013

calculus
Find the area bounded by {y=x2−4 y=4−x2 • sketch the region described • determine any intersection point(s) for the curves (show work!!) • write out the integral(s) that will calculate the area • determine the area (may use a calculator)
October 3, 2013

chemistry Pleae
thankyou its meant to be propyl butanoate and sodium hydroxide
August 22, 2013

chemistry Pleae
C7H14O2 + NaOH What will this combination make? and can it be balanced?
August 22, 2013

chemistry
Dr bob they will go on different carbons, sue knows this they are called isomers, do you have a list of the isomers for this compound?
August 21, 2013

Statistics
A researcher surveyed college students to study their opinion about the proposed change in smoking rules. The researcher asked a group of 30 students: 12 of them supported the change, 13 of them did not, and 5 had no opinion. This is not a binomial model because... A. ...the ...
July 29, 2013

math
Maryann rolls a 6-sided dice six times. How many ways can she roll the dice so that the sum of her numbers is 10?
July 16, 2013

physics
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N). (a) How much force would a single rope ...
June 28, 2013

physics
A woman stands on a scale in a moving elevator. Her mass is 68.0 kg, and the combined mass of the elevator and scale is an additional 713 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9000 N. What does ...
June 25, 2013

Math or business
What will $30,000 earn after 6 yrs at 2.25%?
May 29, 2013

calculus
for the next 7 years how much should I set aside sp that in years 7-12 i can make $4,000.00/month payments?
May 4, 2013

Math (Algebra)
187. each got 3 ice creams and each (except 4 of them) recieved 1 cookie
May 3, 2013

Math
9:15 am. Answer could vary depending on location of Testing. For example if the class were in an airplane it is possible to start the test in one time zone and finish in another.
May 2, 2013

Alegbra 1
X^2-12=-11 First add 11: x^2-12+11=0 Next: (x-11)(x-1)=0 Set each equal to 0: (x-11)=0 (x-1)=0 Get x alone by adding: x=11 x=1 Answer: (11,1) Check work by plugging numbers into original equation.
May 2, 2013

math
30 kg -12kg=18 kg 18kg*5loads=90kgs of sand 1kg= 1000grams 90,000grams of sand
May 2, 2013

math
Small 1/2= .50 Medium 2/5= .40 That means large is .10 10% of the shirts = 5 shirts 5 is 10% of 50. There are a total of 50 shirts.
May 1, 2013

mathematics
30
May 1, 2013

Algebra
4.534 secs. not 100% sure
May 1, 2013

Biology
Question 3 I Think the answer is actually d- slow and fast twitch. Reference Hoefnagels "Biology concepts and investigations" page 595 28.6 B. Muscles contain slow and fast twitch fibers.
April 30, 2013

jardan high. general science
water,anchorge,photosynthesis,mineral,food,support. The main functions of roots are { } and taking in { } and { }. The stems { } the other parts of the plant and transport { },{ } and around the plant.the leaves are the main part making { } by { }.
April 8, 2013

Physics
A physics teacher (mass = 84.5 kg) is jogging through the woods and runs straight into a large oak tree at 3.5 m/s. Rebound speed is measured at 2.3 m/s in the opposite direction. If the time of contact with the tree is 45 milliseconds, what is the magnitude of the force that ...
March 18, 2013

Geometric Sequence
The product of the first five terms of a geometric progression is 32. If the fourth term is 17, compute the second term.
March 12, 2013

math
The product of the first five terms of a geometric progression is 32. If the fourth term is 17, compute the second term.
March 12, 2013

Maths B
Andrew got 68 for both English and Maths. The mean for english was 52 and the mean for Maths was 55. The standard deviations were 10 and 8 respectively. Determine the subject in which andrew did better
March 9, 2013

Math
what is arccot 3.107 equals to in rad?
February 28, 2013

Algebra II
A line has a slope of 2 and contains the points (1, 3) and (2, y). The value of y is what? Please explain in detail
February 22, 2013

Geometry
Picture given with problem: media.glynlyon(dot)com/g_geo_2012/12/img_geou12abc_8.gif If AC = 20, AE = 25, and AB = 5, what is the length of AD? Please explain how this is found, I've got a few problems like this and have no idea how to do it.
January 14, 2013

Consumer Math
Thank you, I was just having some trouble deciding how to do it.
January 11, 2013

Consumer Math
Compute the square footage of carpet needed to cover a room 12' 3" x 18' 4".
January 11, 2013

chemistry
Copper can be determined gravimetrically by precipitation as copper(I)thiocyanate, CuSCN. A wrought aluminum-copper sample(4.5167 g) was dissolved in a minimum amount of concentrated HCl followd by the additon of 25 ml of sulfurous acid to reduced the copper. This solution was...
December 22, 2012

Chemistry
The determination of 4.000 mmol of ZnCl2 is performed gravimetrically by the addition of NaCN solution in a Total volume of 200.00ml. Ksp = 3.0X10^-16 for Zn(CN)2. State and verify all assumption. Assume cyanide does not hydrolyze. a. Derive the COC and COM equations for the ...
December 22, 2012

PLEASE HELP-CHEMISTRY
A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr? ?
December 19, 2012

CHEMISTRY HELP NOW
A balloon at a pressure of 755 torr and a volume of 5.00 L was allowed to rise in the atmosphere to a point at which the pressure inside and outside the balloon was 697 torr. What was the volume of the balloon at that altitude, assuming the temperature was constant?
December 19, 2012

Math
Jean surveyed 25% of all eighth graders and 75% of all 7th graders. John surveyed 50% of all eighth graders and 50% of all 7th graders at the same school. Jean surveyed a total of 152 John surveyed a total of 144 What is the number of eighth graders?
December 17, 2012

Math
what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
November 29, 2012

Math
what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
November 29, 2012

Math
what is the equation for the perpendicular bisector of the line segment whose endpoints are (-7,2) (-1,-6)
November 29, 2012

Business Math Question
You borrow $2,600 and repay the loan in 12 monthly installments of $232. What was the finance charge per $100 of the amount financed?
November 8, 2012

Business Math Question
Finance charge of $2.50 per $100 for 3 payments.
November 8, 2012

Business Math Question
Find the finance charge per $100 on a loan of $12,600 with a finance charge of $1,638.
November 8, 2012

College Chemistry
Using the molar volume (STP) or the ideal gas law equation, determine the molar mass,g/mole, of each of the following. A: 11.2g of a gas that has a volume of 1.50Lat STP? B: .0710g of a gas that has a volume 825ml at 1 atm
October 21, 2012

College Chemistry
A 14.0 g sample of Krypton has a temperature of 25C at 625mm Hg. What is the volume, in Milliliters, of the krypton?
October 21, 2012

economics
which of the following statements about inflation are true? check all that applies a) policy makers also worry about a negative inflation rate, or deflation b) painful government actions may sometimes be necessary to bring down a high inflation rate. c) A moderately high ...
September 23, 2012

Calculus
Nevermind, I got it! I forgot that I could divide everything by the highest power x in the denominator.
September 14, 2012

Calculus
I'm supposed to find the limit as x approaches infinity of (2-x-sinx)/(x+cosx). I've thought about using the squeeze theorem, but I'm not sure it applies here. Can someone point me in the right direction? Thanks.
September 14, 2012

Math
No Idea, the question completely asks that. I was thinking about 12% annually compounded, but the answer I got was wrong due to Solve and Check.
September 8, 2012

Math
How much must you deposit in an account that pays 6% semi-annual interest, compounded annually, to have a balance of $9000 in 15 years? I'm stuck with this question, please explain the steps for the answer.
September 8, 2012

Math
How much must you deposit in an account that pays 6% semi-annual interest, compounded annually, to have a balance of $9000 in 15 years?
September 8, 2012

statistics
Can a percentile have the VALUE of 517? Can a percnetile have the VALUE -5.8? Can a percentile have the RANK 517? Can a percnetile have the RANK -5.8?
August 29, 2012

statistics
is it likely to arrive at a correct research conclusion after making an incorrect statistical conclusion?
August 29, 2012

reading
EVERYBODYS ANSWER IS DIFFERENT!!! -.-
August 9, 2012

English
What is the verb in "where are my shoes"
July 24, 2012

computer
can someone explain this statement please int a=(int *)new int[4][3];
July 22, 2012

CRITICAL THINKING
Please post a substantive response to the following discussion questions by clicking on Reply: Aristotle developed a theory of persuasion by which there are three ways a speaker can persuade an audience. Ethos is the idea that an audience can be persuaded by a speaker's ...
June 28, 2012

Essay
i agree where is the answer
June 21, 2012

Math
A buyer is paying a reduced $500 in closing costs on a home with a sale price of $95,000 in the state of Bath, Maine. If the buyer obtains an FHA loan, what would be the monthly payment if the loan is at 9 percent for 10 years?
April 15, 2012

math
Divide 7/24 by 35/48 and reduce the quotient to the lowest fraction. A. 245/1152 B. 4/10 C. 2/5 D. 42/48
April 12, 2012

physics
A person exerts a horizontal force of F = 174 N in the test apparatus shown in the drawing. (h = 0.33 m.) Find the horizontal force M that his flexor muscle exerts on his forearm.
March 27, 2012

5th grade Math
What is the algebraic expression for 24 more than b
March 27, 2012

calculus
that has to do with trig substitution i believe..
March 12, 2012

calculus
evaluate the ∫from square root of 2 to 2 1/x^3square root of x^2-1 dx 1/24(-6+3 square root of 3 + pi) but i got something different
March 12, 2012

Math
29 * 6^(-3x) = 13 Thanks!
March 11, 2012

accounting URGENT HELP DUE IN 1HR
(a) Fill in the missing amounts. (If answer is zero, please enter 0. Do not leave any fields blank.) Account Titles Trial Balance Adjusted Trial Balance Dr. Cr. Dr. Cr. Accounts Receivable 34,000 Prepaid Insurance 26,000 20,000 Supplies 7,000 Accumulated Depreciation 12,000 ...
March 11, 2012

physics
A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.0 rad/s in 0.901 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.
March 8, 2012

physics
A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 20.0 rad/s in 0.901 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.
March 7, 2012

physics
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, ...
March 7, 2012

Grammer- Capitaliation
Assistant dean Shirin Ahmadi recommended offering more language courses. We went to the mark taper forum to see a production of angels in america. Lydia's aunt and uncle make modular houses as beautiful as modernist works of art We amused ourselves on the long flight by ...
March 3, 2012

COLLEGE CALCULUS. HELP!
Damon is right, I forgot to apply the chain rule.
February 26, 2012

COLLEGE CALCULUS. HELP!
1. 1 turns to 0 2x turns to 2 x^3 turns to 3x^2 (bring 3 up front & subtract 1 from exponent) ^1/4 goes up front and subtract 1 from that =-3/4 Final answer would be 1/4(3x^2+2)^-3/4 2. Use same procedure 1/3 (sec^2t) ^ -2/3
February 26, 2012

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