Thursday
April 28, 2016

Posts by Greg

Total # Posts: 457

math
no row or column contains products with only odd numbers , do you agree?
April 25, 2016

Chemisty
Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.
April 22, 2016

Chemisty
Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.
April 22, 2016

Math
An object is projected directly upward from the ground. Its distance in feet from the ground in t seconds is s equals s=112t−16t^2 The object will be 160 feet from the ground after () ​second(s) and after () ​second(s). The object strikes the ground after...
April 18, 2016

math
sonya spent 3/8 of her money and had $15 left. how much money did she orginally start with?
March 29, 2016

Math
john has 28 marbles and sue had 157 marbles, after each added the same amount, sue had 4 times more than john. how many did they each add?
March 10, 2016

Math
A seed company claims that 90% of its bean seeds will germinate. If seven of these seeds are planted in warm, moist, soil, what is the probability that exactly 6 of them will germinate? Round answer to nearest ten-thousandth (4 places after decimal)
March 5, 2016

Math
The Washingtons buy a $260,000 home by putting 20% down and financing the balance with a 30-year fixed-rate 4.2% mortgage, compounded monthly. What is the amount of their monthly loan payment to amortize the loan?
March 4, 2016

Math
If a baseball player has a batting average of 0.420, what is the probability that the player will get at least 2 hits in the next four times at bat?
February 28, 2016

Math
Find the probability of the independent event. If P (E) = 0.9, P (F ∣ E) = 0.36, and E and F are independent, find P (F).
February 20, 2016

3rd grade math
HAHA oops wrong way :) 40>35
February 3, 2016

3rd grade math
Area : 8 x 5 = 40 square feet 35>40; yes he has enough
February 3, 2016

Math
3 x 2/1 (the reciporical of 1/2) = 6 6 days
February 3, 2016

Math
A rectangular swimming pool is bordered by a concrete patio. The width of the patio is the same on every side. The area of the surface of the pool is equal to the area of the patio. What is the width of the patio? (Length of Pool: 24 Width of Pool: 16)
February 3, 2016

Math
Find the solution to the system of equations by substitution. 2x+5y=8 and 6x+y=10 Would the answer be (1.5,1)?
January 29, 2016

Statistics
A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined below. y = 179.3 − 20.78x (a) Find the ...
January 28, 2016

Math
Solve the sytem of equations using the addition method. 5x+2y=1, x-3y=7
January 28, 2016

math
The MAthematical model C=500x+80,000 represents the cost in dollars a company has in manufacturing x items during a month. How many items were produced if costs reached $250,000? I'm so stumped I don't even know where to start.
January 27, 2016

physics
An electrical device contains a transformer. Its primary coil has 200 turns, and its secondary coil has 20 turns. If the device is plugged into a 120-volt line, what is the output voltage of the device?
November 2, 2015

Chemistry
0.5
October 18, 2015

Algebra
In 2009, a diabetic express company charged $39.95 for a vial of type A insulin and $30.34 for a vial of type B insulin. If a total of $2022.21 was collected for 60 vials of insulin, how many vials of each type were sold?
August 17, 2015

chemistry
To what volume should you dilute 47.0 mL of a 5.95 M KI solution so that 27.5 mL of the diluted solution contains 3.50 g of KI?
July 26, 2015

History
Which of the following best explains why trade among the colonies flourished? The different regions specialized in different crops. The colonies had developed large fleets of trading ships. Existing trade routes were well-maintained by Native Americans. Colonies were founded ...
July 25, 2015

History
Which answer best expresses some of the issues related to economics that are listed in the Declaration of Independence? Cutting off trade and imposing taxes on the colonists are unfair practices. Denying the colonists trial by jury and sending them to Britain to face trial are...
July 25, 2015

Calculus
Using a graphing calculator and the concept of differentials determine the values for x when 1/(1+3x)^5 is approx = to (1-15x) within .01
June 21, 2015

algebra
you need to know the percentage of growth per year in order to be able to answer this question, because the final number depends on that percentage but for example, let's say it is 5% 2012 - 1993 = 19 years therefore, the formula would be (in millions) 171 * (1.05^19) = ...
April 16, 2015

stats
Find the probability of at least 2 girls in 10 births. Assume that male and female births are equally likely and that the births are independent events.
March 16, 2015

statistics
In a certain lottery, five different numbers between 1 and 31 inclusive are drawn. These are the winning numbers. To win the lottery, a person must select the correct 5 numbers in the same exact order in which they were drawn. What is the probability of winning?
March 16, 2015

chemistry
If four grams of Oxygen and four grams of Helium are placed in a five liter vessel at 338 K, what will be the partial pressure of each gas and the total pressure in the vessel?
March 5, 2015

Chemistry
Given that the initial rate constant is 0.0190s^-1 at an initial temperature of 20 degrees Celsius, what would the rate constant be at a temperature of 170 degrees Celsius? Activation energy is 32.4kJ/mol
February 12, 2015

algebra
A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?
February 8, 2015

Math
Find the adjusted balance due at maturity for a 90 day note of $15000 at 13.7% ordinary interest if a partial payment of $4000 is made on the 60th day of the loan.
January 27, 2015

Math
How do I find the exact interest on a loan for $3000 with a simple interest annual interest rate of 15% that was made on June 11 and was due on August 11.
January 27, 2015

chemistry
I dont understand...
January 12, 2015

chemistry
How do i convert mols cacl2 to agcl
January 12, 2015

chemistry
What mass of precipitate is formed when 0.750 L of 2.50 mol/L CaCl2 reacts with 650 mL of 1.75 mol/L AgNO3
January 12, 2015

Chemistry
Find the molar concentration of 57.9 g of potassiuum chlorate dissolved in 975 mL of water my work c=nv (57.9/122.55)(975ml) and i got 460 is this correct
December 16, 2014

Math
It appears Sir John did not answer the question (nine different answers) so if everyone knew their spouse, the answers were 0, 1, 2, 3, 4, 5, 6, 7, and 8. Since there is no indication of who knew whom, Sir John's wife could be any of 0 through 8. There were 36 handshakes ...
December 3, 2014

Physics
An auditorium has dimensions 10m x 10m x 60m. How many moles of air fill this volume at STP? I'm stumped.
December 3, 2014

math
The correct answer is: Assuming both pizzas are equal diameter, thickness and weight (which is virtually impossible, but for sake of argument...) IT IS IMPOSSIBLE THAT MARTY ATE MORE PIZZA THAN LUIS. However, if Marty's pizza was LARGER than Luis's pizza by a ...
December 2, 2014

Math
do you borrow his bike for a total of 41 minutes.before lunch,he vote for one minute less than five times the number of minutes he rolled after lunch. how many minutes did you fire ride before lunch
November 12, 2014

Chemistry 111
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 17. g of ethane is mixed with 107. g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Be sure your answer has the ...
October 22, 2014

geometry
That's so helpful idiot Reiny
October 2, 2014

Physics College
What is the rate of deceleration of a 1400-kg SUV that is going 75.0 km/h and then slows to 25.0 km/h in 8.20 s?
September 30, 2014

algebra
the sum of to kim and tony's ages is 42, the difference in their ages is 4 years. what are the ages of kim and tony?
September 22, 2014

Biology
Is respiratory control sensitive to small changes in arterial PO2 or in arterial PCO2?
September 8, 2014

Physics Electricity and Magnetism
A microscopic droplet of ink in an ink-jet printer is deflected onto the paper by a force of 2.34×10-4 N. If the field causing the deflection is 6.62 kN/C, what is the charge on the droplet? What equation do I use to solve and What does each value mean in the equation? ...
August 29, 2014

calculus
a small business owner buys a truck for $20,000 to transport supplies for her business. She anticipates that she will use the truck for 5 years and that the truck will be worth $10,000 in 5 years. She plans to claim a depreciation tax credit using the straight-line ...
August 2, 2014

Physics
How long will it take the voltage across the capacitor in an RC circuit to discharge 75% of its initial charged voltage if the resistor has a resistance of 450 kilo-Ohms and the capacitor has a capacitance of 49 micro-farads? How do I solve this problem? Thanks!
August 1, 2014

Math
When you use a coupon for 15 percent off the original price of a headset, you pay $27. What is the original price of the headset? Please use an equation.
June 2, 2014

Chemistry
Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) A) 310K B) 1070K C) 1470K ...
May 14, 2014

math
A truck has 5.9L engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression ratio and with 6psi (0.41atm) of boost cruising at 1600rpm. What is the volume of ONE cylinder? Then add 6...
May 4, 2014

Chemistry
Having trouble with this question on my homework =/ 200mL of 0.5M H2SO4 is combined with 500mL of 0.1M NaHCO3. List the physical states of all products, give molarity of aqueous ions and grams of gases and solids. Thanks alot guys!! Any help is awesome
May 3, 2014

Chemistry
Calculate empirical formula C=41.7%,H=6.2%,N=19.3%, and O=33.1% Thanks. any help at all will be awesome!
April 22, 2014

Math Accounting
Determine the proposal’s appropriateness and economic viability. For all scenarios, assume spending occurs on the first day of each year and benefits or savings occurs on the last day. Assume the discount rate or weighted average cost of capital is 10%. Ignore taxes and ...
April 9, 2014

math
In right triangle, the side opposite to right angle is called what? ANSWER FAST PLZ!!! THX
January 29, 2014

alg 2
1670 YAAAAAAAAAAAAAAAAAAAAAAAAAAAAY I GOT IT
January 23, 2014

TRIG help quickly please
Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you π/8 -7π/4 15π/4 3π/4
January 14, 2014

Science check answers please and quickly
1. Jim is doing a physics experiment on the rate of cooling of solid objects in air. Which of the following is a variable that is not directly part of his experiment, but should be controlled in his experiment? (Points : 1) initial temperature to which he heats the solid ...
January 8, 2014

Check Answers Quick -Physics
What causes the centripetal acceleration of an electron in a hydrogen atom? electrical attraction gravity friction <-- tension Question 2. Which of the following terms might a jet pilot use to describe a force that presses him against his seat during a high-speed turn? ...
December 16, 2013

pyhsis
It is spelled physic
November 22, 2013

Reading please please help
Potatoes are good
November 15, 2013

A/P Biology
The Echinopsis mamillosa is a flowering cactus native to Bolivia. A high-rise building is built near a particular Echinopsis, filtering the amount of direct sunlight it receives. Which of the following processes is negatively affected first by the reduction in sunlight? ...
November 14, 2013

Math 8th grade
Type the missing number. -25 -23 -22 -21
November 9, 2013

geometry
4
October 14, 2013

math - calc
A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
October 1, 2013

math - calc
A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
October 1, 2013

chemistry science
substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of water and PNPP stock ...
October 1, 2013

biochemistry
substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of water and PNPP stock ...
October 1, 2013

Math- factoring
Show all work and factor completely. 6a^2+5a-4 (6a^2+8a)-(3a-4) 2a(3a+4)-1(3a+4) (3a+4)(2a+1) Is this correct?
September 28, 2013

Math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...
September 25, 2013

math
if a plane is traveling at an altitude of 11.9 miles and is 46 miles from the airport and is descending at a 12 degree angle, what is the mph to the airport?
September 19, 2013

Algebra 2
A pump removes 1000 gal of water from a pool at a constant rate of 50 gal/min. A.write an equation to find the amount of water y in the pool after t minutes B. graph the equation and interpret the t- and y-intercepts.
September 8, 2013

Physics
Vector C has a magnitude 25.8 m and is in the direction of the negative y axis. Vectors A and B are at angles á = 41.9° and â = 26.7° up from the x axis respectively. If the vector sum A B C = 0, what are the magnitudes of A and B?
September 4, 2013

Finite Math
A sinking fund is the accumulated amount to be realized at some future date (the end of the term) when a fixed number of periodic payments are paid into an account earning interest at the rate of i per period.
July 24, 2013

Physics
6.32 m/s
July 9, 2013

math
250 people on a plane; 120 speak english;150 speak spanish; 30 speak neither. what probability speak English and Spanish ?
June 4, 2013

Math
Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?
May 6, 2013

calcullus
Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?
May 5, 2013

Physics...NEED HELP
Physics help. what are the steps to solving the following problems? Attack on the ice fortress! A comic book villain has taken shelter in an ice fortress in an attempt to hide from the Avengers. Apparently, though, only the Hulk and some guy with a cannon are available to try ...
May 3, 2013

math
If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3
April 25, 2013

english
is correct to say "the patient was brought to the operating room." ? "was brought" seems awkward. Instead, "the patient was taken to the OR."
April 22, 2013

computer science
I need help one how create a spreadsheet that will give an accurate launch profile for a vertical liftoff for the SpaceX Falcon 9 rocket. the information they give me is: •Start with a rocket with a mass, M1, moving with a speed, v1 •The rocket expels some small mass...
April 13, 2013

volumes of prisms
How do the volume of prisms compare as the number of faces in the prisms increases? Does the volume remain the same? Explain Please!
April 7, 2013

math
It costs $35 for 5 friends to go it for lunch. How much is the total bill including 8% tax? How much will each person pay if everyone pays an equal amount?
April 6, 2013

Physics
For parts A-C: /^Vo | 2M | velocity into pg. ->R )2m ) ------ top view rear view A car of mass, 2m, is going around a turn at a constant radius, R, with velocity, v0. The turn is not banked – it is a flat surface. Assume the car and the road are on Earth’s surface...
April 6, 2013

Chem
How many kilojoules of energy are needed to convert 104 g of ice at -14.6 to water at 25.8°C? (The specific heat of ice at -14.6 is 2.01 J/g°C.)
April 4, 2013

chem
Given that Ka for HClO is 4.0 × 10-8 at 25 °C, what is the value of Kb for ClO– at 25 °C? Given that Kb for CH3CH2NH2 is 6.3 × 10-4 at 25 °C, what is the value of Ka for CH3CH2NH3 at 25 °C?
March 26, 2013

Chemistry
I know how to do the ice chart and set up i just dont know how to get the x value that you are saying that i know...
March 26, 2013

chemistry
I dont understand what Y and X are supposed to be
March 26, 2013

Proctology
Hi, I am an 11th grade student beginning to look into some college options. I am interested in pursuing a career in proctology and have been reading some preliminary books on the topic. Can anyone recommend a college or pre-med program that would offer a strong proctology ...
March 25, 2013

Critical Points, Etc.
find the values for a, b, and c such that the function f(x)= x^3 + ax^2 + bx+ c has a critical point at (1,5) and an inflection point at (2,3). a= -6 b= 3 c= 7 i got those, but they're wrong. i'm not sure why. :/
March 20, 2013

Tangent Lines (2)-Calculus
find an equation of the line tangent to y= sqrt(25-x^2) at the point (3,4) i got y= x/8 + 29/8 this is wrong. but im not sure why. can you explain thank you
March 20, 2013

Tangent Lines-Calculus
a line is tangent to the curve y= (x^2 + 3)/ (x+3)^1/2 at the point where x=1. write the equation of this line i get y= 3x-1 yet it's wrong. please explain thank you
March 20, 2013

CHEM
IM SORRY!!!
March 14, 2013

Quantum Physics
The March 9 comment is right.
March 3, 2013

Algebra
Linear Function graphing. y=-x ???
February 7, 2013

Can someone Please Help
Chemistry
February 4, 2013

Can someone Please Help
You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?
February 4, 2013

Chemistry
You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0 A, and the boiling point of ammonia (-33.35 C ) is 200 A What would be the temperature of absolute zero in A ?
February 4, 2013

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