Friday
October 28, 2016

# Posts by CIndy

Total # Posts: 1,015

algebra
Find the perimeter of the triangle whose vertices are the following specified points in the plane? (0,-3), (-2,1) and (-4,6)
October 26, 2016

Analytical chemistry
Calculate to four decimal places the mass of purely dry MgCO3(Magnesium Carbonate) required to make 1L of a 1000 ppm Mg stock solution.
October 20, 2016

Physics
Two identical boxcars (m = 14866 kg) are traveling along the same track but in opposite directions. Both boxcars have a speed of 5 m/s. If the cars collide and couple together, what will be the final speed of the pair?
October 20, 2016

physics
A rectangular loop of wire is placed next to a straight wire, as shown in Fig. 20–55. There is a current of 3.5 A in both wires. Determine the magnitude and direction of the net force on the loop
October 18, 2016

Physics
If the pole-vaulter were to land on concrete rather than on a cushion, the impulse that stops the fall would be what? A) Greater because of the rigidity of the concrete. B) Greater because of the force of impact is greater. C) The same because impulse is the change in momentum...
October 18, 2016

astronomy
The isotope potassium-40 (40K) decays into the isotope argon-40 (40Ar) with a half-life of 1.25 billion years. Suppose we find a rock in which seven-eighths of the potassium-40 has decayed to become argon-40, and only one-eighth of the original potassium-40 remains.
October 5, 2016

math
figure (N) 1 , 2 , 3 Number of Square (S) 2 , 7 , 12 What is the formula?
September 11, 2016

Math
pattern Sort sticks Long sticks number (n) (S) (L) 1 4 2 2 7 4 3 10 6 find formula
September 11, 2016

Math
Simplest form for 2/3 times21
September 8, 2016

Chemistry
An unknown compound contains only C, H, and O. Combustion of 3.70 g of this compound produced 9.03 g of CO2 and 3.70 g of H2O. Im so confused.
September 8, 2016

Kaplan
Ricardo and Jessica are traveling towards each other from points that are 603 miles apart. If Jessica is traveling 9 mph faster than and they meet after 9 hours, how fast was each traveling?
August 24, 2016

math
7*1, 7*3, 7*9, 7*27, 7*81 looks like 7* 3^(x-1) I don't understand how you got (x-1) can you explain?
June 17, 2016

math
1. Examine the first four terms in each of the following number sequences: *2, 7, 12, 17 my formula x+5 *7, 21, 63, 189, 567 my formula x(2)+x *1000, 850, 700, 550 my formula x-150 * –10, –6, –2, 2 my formula x+4 For each sequence, what would be the 20th and ...
June 17, 2016

Math
Lesson is on using formulas A=l*w Create formulas for the following relationships. A. The relationship between the number of tires (not including spares) and the number of cars in a parking lot. B the relationship between the number of minutes to the number of days.
June 15, 2016

Math
Simplify 3(x+2)-4(5-x) Is this how you do it 3x+6-20+4x 7x-14 Is there a way to use a calculator for this
June 14, 2016

Math
Solve 2c+3t=35 for c
June 14, 2016

Math
Is there different ways to solve for 4x-5=9+2x
June 14, 2016

math
At the malt shop a large chocolate shake takes 8/9 of a pint of milk. If the medium shake takes 1/7 the amount of a large, how much does the medium shake take?
June 9, 2016

Math
Jason measured rainfall for a science project. Last week it rained 3 1/8 inches in all. This week it rained 1 7/8 inches in one day and 2 3/4 inches on another. How many more inches did it rain this week then last week? Please explain how you got your anwser
June 6, 2016

Modeling our world
In the Fall Semester, many high schools hold special events to welcome students back to school and to help the students new to the school get into the spirit of the new year. The Student Council decided to order spirit ribbons for all students to wear at a special assembly. ...
June 2, 2016

Math
In an used book store, there are some different mystery novels on a shelf. Suppose there are 64 different ways to buy these novels, including not buying them. How many mystery novels are there on the shelf?
May 26, 2016

Math
A committee of 5 people is to be formed from a group of 7 women and 4 men. How many possible committees can be formed if: the committee then must chose a president and a vice president, how many ways could these two positions be chosen? why is it permutations not combination? ...
May 25, 2016

Math
A circular window has a diameter of 25 inches. It's approximation is 22/7
May 19, 2016

Math
Gunny has a sheet of plywood that is 4 feet by 8 feet she wants to saw the plywood into pieces 1 foot high and 2 feet long for signs How many signs can she make with the sheet of plywood?
May 1, 2016

Math Help
Find the Area: f(x)=sin6x and g(x) = cos 12x, -pi/12 less than or euqal to x is less than or equal to pi/36
April 29, 2016

math
Find the area: f(x)=sin6x and g(x) = cos 12x, -pi/12 less than or euqal to x is less than or equal to pi/36
April 28, 2016

Math
Martin paid \$120 towards his \$2400 credit card bill. What percentage of his bill did he pay?
April 27, 2016

Math
If f[g(x)] = x, then f(x) and g(x) are inverses of each other. Why? I don't get this in my math question.
April 23, 2016

Life Orientation
for research
April 22, 2016

life orientation
bill of rights
April 19, 2016

Math
This is on the 2008 Free response AP Calc AB exam- #4a. Let f be the function given by f(x)=(lnx)(sinx). The figure above shows the graph of f for 0<=x<=2pi. The function g is defined by int{1,x} f(t)dt for 0<x<=2pi. a) find g(1). I don't get why it is equal to...
April 12, 2016

I tried it's very late. Subtract .8 and 3 lbs from 32 lbs. then divide it by 8 liters?😂
April 11, 2016

Math
If there is a hole exactly in the middle of a 15 foot walk and the hole is 2.3 feet wide how far are the edges of the hole from edges of wall?
April 11, 2016

Chelsea has a hole exactly in the middle of her 15 foot long walk, right where the floor and the wall meet. If the hole is 2.3 feet wide, how far are the edges of the hole from the edges of the wall?
April 11, 2016

you want to put a place mat that is 11.5 inches long directly in the center of a table that is 40 inches long. How far is the place mat from either edge of the table?
April 11, 2016

math
prove that 2sinA + 1 / cosA+sin2A=secA
April 6, 2016

English
April 6, 2016

math
why a negative -240?
April 4, 2016

math
This question was in a math competition on April 2nd. I could The answer given was 48853.00
April 4, 2016

math
Nick would like to purchase a vacation timeshare, but he can only afford a \$350 monthly loan payment. He wants the loan to extend 20 years, and the annual interest rate is 6%. How much money will Nick need to borrow if he repays the loan at \$350 per month over the 20-year ...
April 4, 2016

Math
Suppose that INT{pi to t} g(u)du= e^(cos(t)). Show that INT{0 to t}g(u)du= e^(cos(t))- e. I have no idea how to prove. Tried taking derivative of the result, but didn't think that would help with anything.
April 1, 2016

Algebra
For a nonsmoker, the biological half-life of theophylline is 8 hours. Find the amount of the drug retained in a nonsmoker's system 18 hours after taking a one-unit dose. (Round your answer to three decimal places.)
March 27, 2016

Math
There are 12 gum balls,(each a different color), in a bag. One of them is red. What is the probability of reaching into a bag without looking & selecting a color that is not red?
March 12, 2016

Math
How does [(512)^x * ln(2)]/ln(512) simplify into ((512)^x)/9??
March 9, 2016

Calculus
How to do this vertical slicing question: find the area under the curve for the function y=(2x+1)^2 of the interval -1<=x<=3. I am not sure how to do this, but it may involve breaking the integral up. How though?
March 7, 2016

Calculus
Integrate dx/(sqrt(x^2+16)). I have no idea how to start and which method to use. Thinking some sort of trig substitution? But it doesn't look like it. Step by step? Answer key says ln|x+ sqrt(x^2+16)|.
March 5, 2016

Calc
Integrate (x+4)/(x^2+5x-6). I got 2/7ln(x+6)+5/7ln(x-1). But wolfram says 2/7ln(x+6)+5/7ln(1-x). Why is it 1-x instead of x-1??
March 4, 2016

Math
Using FTC(fundamental theory of calculus) evaluate the derivative of: (definte integral- lower bound 0 and upper 2) ∫|2x-1|dx I have no idea how to do this, especially because the dx is on the same side of the equation. It is usually d/dx, but this is also on the other ...
March 2, 2016

Physics
A 4.70 nC point charge is placed at the centre of a hollow metal sphere that has an inner radius 4.70 cm and an outer radius 17.6 cm. The metal sphere itself is charged to 8.40 nC. a)What is the magnitude of the electric field at a distance of 1.60 cm from the centre? b)What ...
February 25, 2016

Science
I need the know how many squares of a grap, if 1/6"=3'. I need to make a floor plan.
February 8, 2016

Algebra
An auditorium seats 1500 people. Floor seats cost \$15 and balcony seats cost \$10. If the place is sold out and they make \$2100 how many seats are on the floor and in the balcony?
February 3, 2016

math
Graph two equations to determine every real number whose square equals its cube. I am so confused!
February 1, 2016

geography
The lengths of two sides of a right triangle are 12 inches and 15 inches. What is the difference between the two possible lengths of the third side of the triangle? Round your answer to the nearest tenth.
January 27, 2016

Chemistry
Calculate the total mass of aluminum, with 90% purity, required to produce 448g of iron in the process Fe2O3 + 2 Al = Al2O3 + 2 Fe
January 21, 2016

math
prove 3cos theta - cos3theta = 2cos theta cos2theta + 4sin theta sin 2theta
January 16, 2016

math
jenny needs to make a total of 85 deliveries this week. so far she has delivered 34 of them. what percentage of her total deliveries has jenny completed? how do u figure this out please
January 14, 2016

math
how do i figure out the percent increase from 0.c0 cents to 0.25 cents?
January 14, 2016

math
For his exercise today, Trey plans to both run and swim. let r be the number of laps he runs and let s be the number of laps he swims. each lap he runs takes him 5 minutes and each lap he swims takes him 2 minutes. he wants to exercise for more than 45 today. Write an inequality
January 14, 2016

math
Jenny needs to make a total of 85 deliveries this week.So far she has completed 34 of them. what percentage of her total deliveries Jenny has completed?
January 14, 2016

math
how do i translate: the sum of a number times 5 and 29 is at most 23 into an inequality sentence number
January 14, 2016

Math
Yes it is square root. I think I figured out the question now. Thanks!!
December 16, 2015

Math
Find an equation for the tangent to the curve y=1+ (sqrt2)(csc(X)) + cot(X). I just learned, though my teacher wasn't super good with explaining, derivatives for trig functions but they still aren't making too much sense. Could you please give me a step by step ...
December 16, 2015

Mat 300/statistics
In how many ways can a committee consisting of 2 faculty members and 3 students be for there are 11 faculty members and 14 students eligible to serve on the committee?
November 25, 2015

Chemistry
2.0 gram of C2H4 is reacted withO2. What mass of water is produced?
November 16, 2015

Chemistry
For the following chemical reaction, how many moles of lead(ii)iodide (PbI2) will be produced from 8 mol of potassium iodide (KI)?
September 23, 2015

math
P2+14p=
September 13, 2015

math
a bank loaned out 60000, part of it at the rate 14% per year and the rest at a rate of 8% per year. if the interest received was 6780, how much was loaned at 14%?
September 13, 2015

Science
How many parts listed make up a plant or animal cell nucleus?
September 9, 2015

Science
No.its not 42 its 3 only.
September 9, 2015

Science
How many parts listed make up a plant or animal cell nucleus?
September 9, 2015

language arts
A. Were lacking in basic necessities.
August 28, 2015

Abnormal Psychology
I have to create a timeline that displays the development of abnormal psychology. I have not been able to find any resources. I tried the link from the 2014 post and it no longer works. Can you please provide a location for me to go to?
July 8, 2015

statistics
12.(b) Subjective probability. 13. (a) classical probability. 14. (c) relative frequency approach
June 30, 2015

Literacy 2
June 19, 2015

Stats
Find the probability that a sample of 12 has a sample mean below 31. the population mean is 26 and the standard deviation is 10
June 11, 2015

Stats
Find the score that separates the top 75% from the bottom 25% if the Mean is 100 and the Standard deviation is 15
June 11, 2015

Stats
Use the normal distribution to approximate the following Binomial probability. A product is manufactured in batches of 100 and a defect rate of 8%. Find the probability of more then 7 defects.
June 11, 2015

math
Tyson talked in 150 customer on his shift yesterday. Of those, 20% resulted in a successful upsell of additional purchased. If Tyson makes a \$ 6.00 commission on top of the regular salary of each successful upsell that he make. how much commission did he make yesterday?
June 3, 2015

Trigonometry
In a parking garage, there are 20 feet between each level. Each ramp to a level is 130 feet long. Find the measure of the angle of elevation.
May 31, 2015

Economics
Assume that a local bank sells two services – checking accounts and ATM card services. Mr. Done That is willing to pay \$8 a month for the bank to service his checking account, and \$10 a month for unlimited use of his ATM card. Ms. Been There wants to pay only \$5 for a ...
May 2, 2015

math
three triangles inscribed in a square. All tangents. What is the radius?
April 14, 2015

Express the weekly profit earned using the variable cost per unit and the fixed cost. TP=TR-TC TP= P(9+33p-p^2)-10(9+33p-p^2)+100 Please help me solve this! I am BEGGING. THANK YOU SO MUCH
April 10, 2015

Math
amy said there are three cubic feet in a cubic yard explain why amy is incorrect
March 26, 2015

Statistics - Can anybody help me?
A Particular pain relieving medicine has a decay rate of 24% an hour. A patient was given a dose of the medicine 5 hours ago and there is currently 74mg of the medicine in the patients bloodstream. Q: What was the Origional dose of the medicine? ________ milligrams. Q How long...
March 13, 2015

Statistics
A Particular pain relieving medicine has a decay rate of 24% an hour. A patient was given a dose of the medicine 5 hours ago and there is currently 74mg of the medicine in the patients bloodstream. Q: What was the Origional dose of the medicine? ________ milligrams. Q How long...
March 13, 2015

using skills
Building and construction are excellent uses of the following skills:
March 5, 2015

statistics
Factories A, B and C produce computers. Factory A produces 3 times as many computers as factory C, and factory B produces 6 times as many computers as factory C. The probability that a computer produced by factory A is defective is 0.02, the probability that a computer ...
February 22, 2015

Crime and Society
Plea Bargaining, and Nixon's racist drug war.
February 6, 2015

Physics
Suppose that the amount of heat removed when 2.9 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze? I don't know where to start with this question! Please help.
February 2, 2015

Science
changes in the carbon cycle cause global temperatures to rise how might this affect the water cycle
November 22, 2014

music
1. In a major or minor scale, which scale degree is called tonic? A.first B.fifth C.sixth D.seventh
November 18, 2014

Science
A scientist is studying a plant species in which the flower color genes are codominant. The scientist crosses a plant with red flowers and a plant with white flowers. The offspring will most likely have A.red flowers B.white flowers C.pink flowers D.red flowers with white ...
November 6, 2014

Math
Chris has a square garden with an area of 38.a m squared. He decreases the length of each side by 1.7 m to make a smaller garden. What is the perimeter of the smaller garden. {Hint find the length of each side of the bigger garden first, then decrease the length, then find the...
November 5, 2014

In the case of ADC Telecommunications in Mexico, Mario Dena, the vice president of manufacturing at ADC de Juarez, considered constructing an on-site childcare center and a water treatment facility. Which of Richard T. DE George's guidelines is illustrated in this example?
October 29, 2014

algebra
y^1/3(y^4/9-3y^2/9)
October 23, 2014

chemistry
a solution is made by mixing 38.0 ml of ethanol C2H6O, 62.0mL of water. assuming ideal behavior, what is the vapor pressure of the solution at 20 C
October 10, 2014

word processing
Which sentence uses a comma correctly? A. She wanted to be an astronaut, after finishing school. B. Thank you for returning my call, Mary. C. He would like to order the steak, and fries. D. Jim grabbed a bottle of ketchup, to go with his fries.
September 26, 2014

accounting
. Preference Decisions: NPV vs. IRR vs. Profitability Index Stephens Industries is contemplating four projects: Project P, Project Q, Project R, and Project S. The capital costs and estimated after- tax net cash flows of each project are shown in the table that follows. ...
September 10, 2014

I'm to compare I have a Dream speech with Mandela's Inauguration speech literary devices used in their speeches. I found the similarities of literary devices used for both speeches but I cant answer the differences of literary devices between the two speeches. Could ...
August 29, 2014

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