Wednesday
December 7, 2016

Posts by Chris

Total # Posts: 2,662

Statistics (Math 210)
Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) According to a local chamber of commerce, in 1993, 5.9% of local area residents owned more than five cars. A local car dealer claims that the ...
December 4, 2016

Statistics (Math 210)
Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) A manufacturer claims the standard deviation of salt in their meat is .5. An SRS of 18 samples shows the standard deviation (s)= .62 (alpha = ....
December 4, 2016

Statistics (Math 210)
Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) A manufacturer claims that the mean lifetime of its lithium batteries if 1200 hours. A homeowner selects 25 of there batteries and finds the ...
December 4, 2016

Math
Two debts ---- the first of $800 due six months ago and the second of $1400 borrowed one year ago for a term of three years at 6.5% compounded annually ---- are to be replaced by a single payment one year from now. Determine the size of the replacement payment if interest is 7...
December 3, 2016

Math
The sum of 24 and Vanessa's age is 40
November 22, 2016

Stats
4 teachers selected from 13 parents and 5 teachers
November 21, 2016

Arithmetic
If pencils are bought at 70 cents per dozen and sold at 3 for 20 cents, the total profit on 6 dozen is?
November 16, 2016

Arithmetic
a folding chair regularly sells for $29.50. how much money is saved if the chair is bought at a 20% discount?
November 15, 2016

science
a bullet is shot from a springfield rifle with a speed of 3,015 ft/s. assuming the bullet moved at a constant velocity, what is the time required for the bullet to strike a target 4,146 meters away
November 9, 2016

Marh
What is 3 pints to 15 pints?
November 9, 2016

MATH
An inch on a map represents 200 miles. On the same map, a distance of 375 miles is represented by? A. 1 1/2 inches B. 1 7/8 inches C. 2 1/4 inches D. 2 3/4 inches Thank you for your help.
November 9, 2016

Arithmetic
a boy sold $88.50 worth of stationery. If he received a 33 1/3% commission, what was the amount of his commission?
November 7, 2016

arithmetic
on a certain day, the temperature range from -2f to 10f. what is the difference between the high and low temperatures for that day?
November 7, 2016

Statistics
"Suppose two independent samples have been collected.Based on a sample of 26 from the first population, you observe 14 successes. The second sample of size 26 had 17 successes. What is the critical value for a 85% confidence interval that compares these two population ...
November 5, 2016

Arithmetic
A man paid $42.30 for gasoline in may, $38.60 in June, and $43 in July. What was the average monthly cost for gasoline?
November 5, 2016

Arithmetic
A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8 percent payable in stock. How many shares did he then own? 81 shares but how?
November 5, 2016

Math
Six gross of special drawing pencils were purchased for use in a department. If the pencils were used at the rate of 24 a week, the maximum number of weeks that the 6 gross of pencils would last is?
November 5, 2016

math
A dealer bought some bicycles for $4,000. He sold them $6,200, making $50 on each bicycle. How many bicycles were here?
November 5, 2016

math
A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8%, payable stock. how many shares did he then own?
November 5, 2016

math
Thank you So much. The answers given are A - 81 shares B - 90 shares C - 91 shares D - 95 shares should i round it off to 81? thanks for help on this.
November 2, 2016

math
A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8%, payable stock. how many shares did he then own?
November 2, 2016

science
kinsey leaves her house to exercise and run straight down a long street for 5.00 meters at a constant rate of 3m/s then turns and run back toward her house for 2 meters what is her average speed in m/s what is her displacement what is her average velocity in m/s
November 1, 2016

electric heating appliance and fan
bus bars are used in an electric iron as
October 28, 2016

motor driven small appliance
vacuum strength is rated in terms of
October 26, 2016

cooking appliance
a digital clock on small cooking appliance keeps time by
October 26, 2016

Spanish
Instructions: Modifique el párrafo por cambiar las palabras entre comillas al tiempo FUTURO. Modelo: Mi familia ‘va a visitar’ a nuestros abuelos este verano. Mi familia visitará a nuestros abuelos este verano. Este año ‘vamos a hacer’ ...
October 26, 2016

cooking appliance
the time required for resin cement to set is about
October 26, 2016

cooking appliance
the time required for epoxy resin cement to set is about
October 26, 2016

Physics
What the hell are u teaching people!!! :)
October 26, 2016

Algebra Two
David’s monthly salary is $2500 plus 6% commission on his sales. What must be the amount of his sales for him to earn at least $3,100 each month?
October 25, 2016

English Writing
The explain in one paragraph for each website why you think the website is good for academic work. Structure: Topic sentence 2-3 reasons why it is good or bad, or a little of both. Concluding sentence. Make sure to use the evaluative word "because" in your writing. ...
October 23, 2016

Math Homework
The following frequency table contains the total number of deaths worldwide as a result of earthquakes from 2000 to 2012. Year Deaths 2000 231 2001 21,357 2002 11,685 2003 33,819 2004 228,802 2005 88,003 2006 6,605 2007 712 2008 88,011 2009 1,790 2010 320,120 2011 21,853 2012 ...
October 22, 2016

math
-23 1/3
October 22, 2016

Math, Functions
Thanks for answers!!
October 22, 2016

Math, Functions
It isn't t=3 ..?
October 22, 2016

Math, Functions
If g(t)= 1/t-2-1, how to solve g(t)=0 ...? Please teach me..!
October 22, 2016

Math
This is a Bennett diagram question. If 24 students take music, calculate the number of students who take music and drama and also calculate the number for drama only If 3x + x +7 + x
October 20, 2016

Chemistry
What mass of calcium citrate, Ca3(C6 H5 O7)2, would a tablet manufacturer need to use to provide the same amount of Ca that you found in your tablet? (show calculations) The mass of Calcium for the experiment was .7374g We assumed that any solid that formed when Na2CO3 was ...
October 17, 2016

Math
What is the value of -3 + 4.5 - (-1.2)?
October 17, 2016

Math Functions
Hello. Could you please help with my math homework...? An online bookseller gives the following information for their shipping information: "The shipping and handing charge per order is $4, plus $1.50 per book." Let x = the number of books that someone orders. Let S(...
October 17, 2016

chem
For the reaction 2 N2(g) + 3 H2(g) → 2 NH3(g) which of the following can be determined using only the coefficients of the balanced chemical equation? the number of moles of NH3 obtained if 4.2 mol of N2 react completely to form NH3 the weight of NH3 obtained if 4.2 mol ...
October 16, 2016

chem
Using the balalnced chemical equation, how many grams of MgO are produced when 31.0 grams of O2 react completely with Mg? 2 Mg + O2 → 2 MgO Molar Mass Mg = 24.3 g/mol O2 = 32.0 g/mol MgO = 40.3 g/mol 55.7 78.1 89.1 111.3
October 16, 2016

chem
Using the balanced chemical equation, the number of moles of oxygen gas needed to react with 2.5 moles of Mg is __________. 2 Mg + O2 → 2 MgO
October 16, 2016

Social Studies
I have to search and compare these civilization... ・pre 20th century Japan ・Incan It's my Social Studies project😲💦 Would you recommend me some good websites in English?
October 16, 2016

Science, Nature Sciencence, Nature Sciencence
What type of evidence do scientists have that helps them to know what life was like in the past?
October 15, 2016

Spanish
Wow! Thank you very much Sra. that helped me a lot and I will learn from it so I can improve in the future.
October 11, 2016

Spanish
SraJMcGin can you please help me? Modifique el texto por cambiar los verbos italizados de lo familiar (informal) a lo formal Prepara (1) prepare para salir de viaje el lunes por la mañana. Para ello, haz (2) haga las maletas, sal (3) salga de la habitación y m&...
October 11, 2016

Spanish
Hello, I have corrected the issue and reposted it. Sorry about that.
October 11, 2016

Spanish
SraJMcGin can you please help me? Modifique el texto por cambiar los verbos italizados de lo familiar (informal) a lo formal Prepara (1) _____ para salir de viaje el lunes por la mañana. Para ello, haz (2) ______ las maletas, sal (3) _____ de la habitación y m&...
October 11, 2016

Earth science
If the volume in a graduated cylinder is raised from 50ml to 51 ml, what is the objects volume?
October 9, 2016

Statistics
A = 3000(1+((.03)/12))^(12)(9) Just plug that into a calculator
October 9, 2016

Calculus I
You are watching the Chicago marathon from your friend's apartment, 100 feet above the street. A runner passes the building at 11 feet/sec. Let d denote the distance between the base of the building and the runner, and let h denote the distance between you and the runner. ...
October 9, 2016

Math
A​ one-product company finds that its​ profit, P, in millions of​ dollars, is given by the following equation where a is the amount spent on​ advertising, in millions of​ dollars, and p is the price charged per item of the​ product, in ...
October 9, 2016

statistics
A STAT 200 instructor is interested in whether there is any variation in the final exam grades between her two classes Data collected from the two classes are as follows: Her null hypothesis and alternative hypothesis are: (a) Determine the test statistic. Show all work; ...
October 7, 2016

Math
I did binomcdf(22,.25,6) in my calculator. n=22, p=.25, x=6 Is this the correct process?
September 18, 2016

Math
Suppose a fair four-sided die is tossed 22 times. What is the probability of getting at most 6 fours?
September 18, 2016

Chemistry
If you had dehydrated 1.00g of the hydrate CaCl2 ∙6H2O how many grams of anhydrous CaCl2 would you expect to be produced? Show calculations. I really am having a hard time with this question. I don't know where to start and how to perform it.
September 18, 2016

stats
Find the​ z-scores for which 92 ​% of the​ distribution's area lies between minus z and z.
September 18, 2016

Math
I have a bag with 2 different kinds of objects: 17 cubes, 19 spheres. If I randomly pick from the bag 5 of these objects without return any of it, what is the probability of getting at least 1 of each kind?
September 11, 2016

Pre-Calculus
The minute hand of a clock is 3 inches long. How far does the tip of the minute hand move in 5 minutes? If necessary, round the answer to two decimal places.
September 10, 2016

Math Precal
An airplane has an airspeed of 650 km/h bearing 15 degrees north of west. The wind velocity of is 19 km/h in the direction of 30 degrees east of south. Find the resultant vector representing the path of the plane relative to the ground. What is the ground speed of the plane? ...
September 6, 2016

math
thank you got the answers correct
August 29, 2016

math
I need help figuring the grade for two students I keep getting a big number. *Note Final can replace a low exam grade 𝐺𝑅𝐴𝐷𝐸 = .15 ∗ (𝐷𝑎𝑖𝑙𝑦 𝑎𝑣𝑔) + .65 ∗ (𝐸...
August 29, 2016

Bus. QA Compliance
Need assistance with a project summarizing and analyzing a quality assurance program for a financial services company
August 16, 2016

biology
biology
August 7, 2016

Science
What does sc mean on all jewlry items
August 6, 2016

Math
What does sc mean on all jewlry items
August 6, 2016

Math
On Feb. 27th, 2010, an earthquake of magnitude 8.8 occurred off the coast of Chile lasting up to 3 minutes. Five months later, a 2nd earthquake occurred with magnitude of 5.3. How much more intense was the first earthquake compared to the 2nd earthquake?
July 14, 2016

Chemistry
Equation of Mg(OH)2 (aq) + KOH (aq) gives you what ?
July 11, 2016

math
the building supply store sells one liter bottles of water for $1.09 approximately how many 8 ounce servings of water in 1 liter
July 11, 2016

chemistry
What is the difference between the acid and base notation of a hydroxide? Give an example of the same molecular formula written in acid and base notation.
July 6, 2016

financial management
Angela Anderson is employed as a Tax Manager by Super Cell Phone Service, Inc. She earns $135,000 per year in this role, supervising a department of five Tax Accountants. Calculate the Medicare taxes that will be withheld from Angela’s annual salary assuming a tax rate of...
June 12, 2016

English
People who don’t know Harry tend to underestimate him. They cast a skeptical eye on his typical outfit: ragged jeans and shirts that bear evidence of his most recent meal. And his most frequently uttered expression, “Waaaal, I just don’t know,” can make ...
May 24, 2016

Math
suppose that when your friend was born your friends parents deposited $4000 in an account paying 4.1% interest compounded quarterly. what will the account balance be after 15 years?
May 22, 2016

math
a plat form and a building are on the same horizontal plane , the angle of depression of the bottom of the building from the top A of the platform is 39 degree. the angle of elevation of the top D of the building from the top of the platform is 56 degree. given that the ...
May 12, 2016

Chemistry
When chromium has 26 electrons, how many neutrons and protons does it have and what is it's standard notation
May 10, 2016

Calculus
Farmer Jones, and his wife, Dr. Jones, decide to build a fence in their field, to keep the sheep safe. Since Dr. Jones is a mathematician, she suggests building fences described by y=4x^2 and x^2+10. Farmer Jones thinks this would be much harder than just building an enclosure...
May 6, 2016

Math 3
How many times bigger is 8*10^6 than 2*10^2?
May 6, 2016

Maths
If a car weighing 1,054kg collides with another car and then takes 60 metres to come to rest can the speed at the pint of impact be calculated?
May 6, 2016

Math
it's 4 because 3+3=6 and 4+2=6
May 4, 2016

Trig
Problem: A cable from the top of a 60 foot high tower is to be attached to the ground (x) feet from the base of the tower. A) if the cable makes an angle of t radians with the ground when attached, express t as a function of x. B) if t = pi/5, how far is the end of the cable ...
May 1, 2016

PHYSICS SPECIFIC GRAVITY
A 6.8 kg block of some unknown material is suspended from a spring scale and submerged in water. The spring scale reads 48.0 N. What is the specific gravity of the block?
April 25, 2016

science
H2SO4 is labeled 93.2% and density 1.94g/cm3. Find moles in H2SO4?
April 24, 2016

Chemistry
Hello Dr. Bob, I see the mistake that I have made, but the initial values that were in my first sentence were given, I just think my coefficients in the equation were wrong. Do the answers at the bottom make sense though?
April 23, 2016

Chemistry
A flask initially contains 2.00 atm of NH3, 2.00 atm of N2, and 3.00 atm of H2 at 673 Kelvin. -What is the delta G for the reaction? -What is the equilibrium partial pressures of each gas at 673 Kelvin? So I figured out how to do the first question with relevant values: : ...
April 23, 2016

Algebra
7 – 5(2 – x) = –(x – 8) = 11/6
April 19, 2016

Math
Evaluate: -17 + 6 =
April 19, 2016

math
Lines a and b are parallel. When they are cut by transversals, they form a triangle. es025-1.jpg What is es025-2.jpg es025-3.jpg
April 19, 2016

Chem
Given the equation 2C8H18 + 25O2 = 16 CO2 + 18H2O: How many moles of oxygen gas (O2) are consumed upon combustion of 2.20 L of octane ( D = 0.703 g/mL)?
April 10, 2016

Work
A truck carrying a 57 kg crate accelerates uniformly from rest to 86.5 km/hr in 18.4 s. Calculate the work done on the crate by the truck (in J). I got 16454 J right. Now why is it positive? K-K = negative if Velocity from rest is 0.
April 10, 2016

Block Colliding with a Spring
I think there something wrong with the quiz, cuz it tells me its wrong. I tried 3.75N (work by spring) and also total work done. It shouldnt be, I got the 2 other questions right. Still, thank you.
April 10, 2016

Block Colliding with a Spring
A moving 1.60 kg block collides with a horizontal spring whose spring constant is 480 N/m. The block compresses the spring a maximum distance of 12.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.480. What is ...
April 10, 2016

PHYSICS CENTER OF MASS
what is the .065??? same for y .065???
April 10, 2016

chemistry
A radionuclide undergoes alpha emission, and thorium-234 is produced. What was the original radionuclide?
April 7, 2016

math
Can you plz do callbck for 0799998736&0742239920 then i will call u as soon as i can to tell u anything about careers
April 7, 2016

Math
A student takes a true-false test exam with 10 questions. If the student guesses all ten questions, find the probability he gets 7 or 8 right. p(x=7) + p(x=8) (.5)^7(.5)^3 + (.5)^8(.5)^2 I have the correct answers which are .117+.044= .161 But when I calculate the answer on ...
March 30, 2016

Chemistry
A single dose of a certain antacid contains 250. mg of Mg(OH)2 and 300. mg of CaCO3. How many mmol of H+ can be neutralized by one dose of this antacid? Do not include units in your answer
March 29, 2016

math
the product of a number and five decreased by eight
March 29, 2016

math
use the unit circle to determine the exact value of each angle: sine 30 degrees, cosine pi, sine 11 pi divided by 6, and cosine 135 degrees.
March 28, 2016

math
find the values of cosine 21 degrees, and sine 3 pi divided by 10
March 28, 2016

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