Sunday

December 4, 2016
Total # Posts: 312

**chemistry**

Derived the equation pH = pKa + Log [base] for a weak acid and its conjugate base, [acid]

*December 1, 2016*

**chemistry**

Tell how you would prepare an acetic acid/acetate buffer solution having apH of 3.79. Ka for acetic acid = 1.85 x 10-5

*December 1, 2016*

**math**

if there are 19 boys and 24 girls in the math class. 10 boys and 15 girls are freshman. if you randomly choose a student, what is the probability that it will be a girl or freshman?

*November 1, 2016*

**College Algebra**

ok, so I need to come up with an answer for this question- A car traveling 65mph on the hwy gets 25 miles per gallon. Write the function that represents the distance d(t) in miles that the car travels in t hours. *Then, Write a function that represents the number of gallons of...

*October 5, 2016*

**Physics**

Two ants race across a table 76 cm long. One travels at 5.2 cm/s and the other at 2 cm/s. When the first one crosses the finish line, how far behind is the second one? Answer in units of cm. Can you teach me how to do this plz?

*October 1, 2016*

**Math**

Please Steve, how did you find -3 and 1/3?

*April 25, 2016*

**Math**

Here is the problem. I got the answer but I would like a better understanding. Find the equation of a line that passes thru(6,-2) and is perpendicular to equation x-3y+16. I got the final answer being -3x+16. Can someone please explain how to get this? I am so confused!

*April 25, 2016*

**Math**

tan(θ)/ sec(θ) − cos(θ) Please help!

*April 19, 2016*

**math**

If it says write the equation, five less than half a number is forty would the answer be 1/2n-5=40

*January 7, 2016*

**Statistic**

We thought if we each post a question you would answer our question. This is not a game we need help for our statistics math course before Monday day

*November 28, 2015*

**Statistic**

test consists of 10 multiple choice questions with five choices for each question. As an experiment, you GUESS on each and every answer without even reading the questions. What is the probability of getting exactly 7 questions correct on this test?

*November 28, 2015*

**science**

A 2.1kg soccer ball is struck with a 45N force for .3 seconds. What is the Frictional force if the ball rolls for 11 seconds before stopping.

*November 16, 2015*

**English**

They're different in meaning because in 1, the lady looked up AT the man. So she physically had to look up AT him. In 2, the lady looked up TO the man. As in, I look up TO my brother. He is a great student. So she idolizes him is kind of the meaning.

*September 14, 2015*

**math**

ou were named District Manager of the Month at BeBop Records due to a hiring study you conducted. Your study showed that each of 30 salespersons that you supervise average $50,000 in sales each month. Your study also showed that for each new salesperson hired, the average ...

*July 23, 2015*

**Math**

Austin bought a new house. The value of his house is modeled by the function H\left( x \right) = 120000{\left( {1.20} \right)^{\left( {\frac{1}{2}x} \right)}} where x is the number of years since he purchased the house. Looking at the model by what approximate percentage rate ...

*July 14, 2015*

**English**

Among the many marchers included,President Meyers who walked for the fifth time. Is this sentence OK, or how could I fix it?

*May 2, 2015*

** Calculus**

Does the series (cos(k/3))^2/2^(k/3)+1 from k=1 to infinity converge?

*March 29, 2015*

**Trigonometry**

16 sin^2 x = 16 − 8 cos x Find all solutions of the equation in the interval [0, 2π)

*March 16, 2015*

**7th grade geometry**

When wrapping a present in the shape of a rectangle prism, joe adds an additional 2.5 feet of paper to allow for overlap. How many sq ft does he use to wrap a gift 3.5 ft long, 18 inches wide, and 2 ft high?

*March 12, 2015*

**Chem**

c) Nearly all of the OH- comes from the first ionization. e) The approximations are usually valid because the first ionization constant is usually much larger than the second ionization constant. b) The concentration of OH- and the conjugate acid of the weak base (the anion of...

*February 27, 2015*

**science**

When a fan is turned on it changes electrical energy into blank energy is it ma. Motion b.magnetic c. Gravitational. D. Electromagnetic

*January 27, 2015*

**english please help**

im really stuck,i need help

*January 20, 2015*

**english**

what's the meaning of 1. i've grown certain that the root of all fear is that we've been forced to deny who we are

*January 20, 2015*

**english**

so what exactly does the quote mean exactly? i'm sort of lost

*January 20, 2015*

**english**

what does this quote mean: never underestimate the power of stupid people in large groups please help!

*January 20, 2015*

**Physics**

A person weighing 900 Newtons is standing on snowshoes. Each snowshoe has an area of 2500cm^2. What is the pressure on the snow?

*January 6, 2015*

**Precalculus**

275, 000. $650

*December 11, 2014*

**statistics probability**

Assume that the thermometer readings are normally distributed with a mean of 0 degrees C and a standard deviation of 1.00 degrees C. A thermometer is randomly selected and tested. The probability of getting a reading between -1.39 degrees C and 1.69 degrees C is ____

*December 11, 2014*

**geometry**

Satellite Explorer VII, with a = 4465 and b = 4462, and with the center of the Earth being at one of the foci of the ellipse. Assuming the Earth has a radius of about 3960 miles,graph both the orbits of Explorer VII and earths surface on the same axis if the average radius of ...

*December 10, 2014*

**Chemistry**

What is the freezing point of a solution that contains 21.1g of urea, CO(NH2)2, in 305mL water, H2O? Assume a density of water of 1.00 g/mL.

*December 6, 2014*

**statistics**

Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. A survey examines the preferences for laundry detergent. ***The admissions office wants to estimate the cost of textbooks for students at ...

*November 22, 2014*

**Health**

2. C 5. A 7. A 13. D 14. D 17. C 19. C

*October 8, 2014*

**Health**

13. D

*October 8, 2014*

**Managerial Accounting**

I have a homework problem that asks me to do the following: 1. Prepare a schedule of total cash collections for October through December. 2. Prepare a schedule of total cash disbursements for October through December. 3. Prepare a cash budget for October through December. I ...

*October 6, 2014*

**Physics**

A basketball is thrown horizontally with an initial speed of 4.70m/s . A straight line drawn from the release point to the landing point makes an angle of 30.0 ∘ with the horizontal. What was the release height?

*October 5, 2014*

**algebra**

a squirrel can run at a speed of 20 miles per hour. How many feet per second is this?

*October 2, 2014*

**College Algebra**

Jen recently rode her bicycle to visit her friend who lives 12 miles away. On her way there, her average speed was 10 miles per hour faster than on her way home. If Jen spent a total of 1 hour bicycling, find the two rates.

*September 30, 2014*

**Chemistry **

If a sample of silver carbonate contains 1.75 grams of silver [Ag] atoms, calculate the mass (in grams) it contains of oxygen atoms [O].

*September 24, 2014*

**Math quadratic word problem**

The base of a triangle is 4cm shorter than twice the altitude, find the dimensions if the area is 80sqcm. this is work x(2x-4)=80 2x squared - 4x=80 2x squared -4x-80=0 (2x 8)(x-10) =0 so x= -8 and x=10 my classmate told me its wrong so can you pls help me.,

*September 16, 2014*

**Math using quadratic equation**

The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I don't really know the formula using quadratic im sorry

*September 15, 2014*

**Math using Quadratic equation**

The area of a square is 196cm2(squared), find the measure of one side. Thank you,, this is my assign. In math1, im using the formula A=s*s but i need to solve this using quadratic equation.

*September 15, 2014*

**Chemistry**

How much energy, in calories, is needed to heat 18 cubic centimeters of fat from 25 degrees Celsius to 35 degrees Celsius?

*September 3, 2014*

**algebra**

A rock is thrown upward with a velocity of 15 meters per second from the top of a 30 meter high cliff, and it misses the cliff on the way back down. When will the rock be 10 meters from the water, below? Round your answer to two decimal places. I am not understanding how to ...

*August 24, 2014*

**organic chemistry**

What is the complete reaction mechanism for the reaction between butanone and methylamine (CH3NH2) with the reaction buffered at a pH of 3.5 and heated.

*July 28, 2014*

**algebra**

express 5/2 x (1/11 - 1/2) as a single fraction

*June 20, 2014*

**algebra**

Factor: 3x^2 + 5x - 2

*June 20, 2014*

**Math**

The numerator of a simple fraction is 2 less than its denominator. The sum of this fraction and its reciprocal is 2 4/35. Find this fraction.

*May 8, 2014*

**Chemistry**

A 495-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 18.1g CO2. What was the concentration of the HCl solution?

*May 5, 2014*

**Chemistry**

What volume of 1.25M HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.300M Na2CO3?

*May 5, 2014*

**S.S (DAMON)**

How are natural disaster like hurriccanes and earthquake a threat to biodiversity? A. They destry natual habit

*March 13, 2014*

**geometry**

if the measurement of angle fgk is 3y-4 and measurement of angle kgh is 2y+7 find x

*February 13, 2014*

**Geometry**

Player hits the ball at point A an angle of 45 degrees on a pool table that measures 9’ by 4.5’. How many times will the bait a side of the table before going into a pocket?

*January 26, 2014*

**Bus 311**

1. Petra contracted to paint Bret’s house for $2,000. After beginning the job, Petra realizes that the house is really quite big, and she’s not going to make enough profit, so she tells Bret she wants another $500 to finish the job. Bret doesn’t want to pay ...

*January 9, 2014*

**Business Law 311**

#10- There is no contract - Merlin never made an offer

*December 8, 2013*

**College Algebra**

solve the polynomial inequality and graph on number line. express in set interval rotation. Show work x^3 - 3x^2 - 9x + 27 < 0

*November 24, 2013*

**Stats**

Which of the following statement is true? In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha. A 95% ...

*November 18, 2013*

**Personal finance**

D

*October 24, 2013*

**Accounting**

Describe the mechanisms that WorldCom’s management used to transfer profit from other time periods to inflate the current period.

*October 5, 2013*

**Physics**

At t = 0, an automobile traveling north begins to take a turn. It follows one-quarter of the arc of the circle of radius 9.8 m until, at t = 1.38 sec, it is traveling east. The car does not alter its speed during the turn.

*September 23, 2013*

**Chemistry **

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 5.8cm . Its mass is 1.5kg . Calculate the density of the metal.

*September 2, 2013*

**Science**

What effect does CRH have on the corticotrophs of the anterior pituitary?

*June 11, 2013*

**STATISTICS**

(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...

*June 2, 2013*

**Statistics**

(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...

*June 1, 2013*

**Statistics**

women's heights are normally distributed with a mean 63.1 in and standard deviation of 2.5. A social organization for tall people has a requirement that women must be at least 69in tall. What percentage of woman meet that requirement? The percentage of woman that are ...

*June 1, 2013*

**Math**

If you are dealt a 5-card hand from a standard deck of 52 playing cards, what is the probability (rounded to 6 decimal places) that you are dealt at least 4 hearts?

*May 5, 2013*

**statistics**

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9. If a student received a score of 82, what was this student’s z-score?

*April 19, 2013*

**Algebra**

Find the equation with the given properties. Express the equation in slope intercept form. Containing points p=(-4,-2) and Q=(-2,1) What is the equation of the line? y=

*April 14, 2013*

**math**

Sorry The ratio of yellow paint to blue paint is 3 quarts to 2 quarts to make the color green to paint my bathroom. I need a total of 12 quarts of yellow paint?

*April 6, 2013*

**math**

The ratio of yellow paint to blue paint is 3 quarts to make the color green to paint my bathroom. I need a total of quarts of yellow paint. How many quarts of blue paints I need?

*April 6, 2013*

**Use the intermediate value**

Not sure that is why I asked :)

*March 26, 2013*

**Use the intermediate value**

Use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=9x^4-3x^2+5x-1;[0,1]

*March 26, 2013*

**Solve the inequality...**

Solve the inequality x^2(9+x)(x-9)/(x+7)(x-5) is greater than or equal to 0?

*March 25, 2013*

**College algebra**

Form a polynomial f(x) with real coefficents having the given degree and zeros degree 5; zeros: 5; -i; -9 +i f(x)=a

*March 25, 2013*

**Using the remainder**

use the remainder theorem to find the remainder when f(x) is divided by x - 3. Then use the factor theorem to determine whether x-3 is a factor of f(x) f(x)=2x^3-10x^2+11x+12

*March 24, 2013*

**Solve the inequality**

Solve the inequality x^2(8+x)(x-9)/(x+4)(x-7) is greater than or equal to 0?

*March 24, 2013*

**inequality**

solve the inequality (x+8)^2(x-4) > 0

*March 24, 2013*

**College algebra**

Find the vertical, horizontal, and qblique asymptotes, if any, for the following rational function. T(x)=x^2/x^4-256

*March 24, 2013*

**Algebra**

Find the following function f(x)=(x+3)^2(x-1)^2 (a)Find the x and y intercept of the polynomial function f. (b) Determine whether the graph of the f crosses or touches the x-axis at each x intercept. (c) Put all the information to obtain the graph of f.

*March 24, 2013*

**Algebra**

Use completing the square to describe the graph of the following function. Support your answer. f(x)=-2x^2+4x+1

*March 24, 2013*

**Algebra**

Find the vertical, horizontal, and oblique asymptotes, if any, for the following rational function. T(x)=x^2/x^4-256

*March 20, 2013*

**Algebra**

Determine the quadratic function of f whose vertex is (2,-1) and passes through (3,1) f(x)=

*March 19, 2013*

**Use completing the square to...**

Use completing the square to describe the graph of the following function support your answer graphically. f(x)=-2x^2+4x+1

*March 19, 2013*

**Quadratic function**

Determine the quadratic function f whose graph is given. The vertex is (-3,-13) and the y-intercept is -4 f(x)=

*March 19, 2013*

**math**

I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

*March 18, 2013*

**math**

I have an average of 66.67 i need a 70percent to pass the class, what do i need to get on thenext test?

*March 18, 2013*

**Given the following rational function**

Given the following rational function, find a) the horizontal asymptote(s), b) the vertical asymptote(s), if any, and c) the oblique asymptote(s), if any. F(x) = x^2-x-2/2x^2-x-2

*March 16, 2013*

**Please help! quadratic equation**

Given the following quadratic equation find. a) the vertex b) the axis of symmetry c) the intercepts d) the domain e) the range f) the interval where the function is increasing g) the interval where the function is decreasing h) graph the function y= -x^2-6x

*March 16, 2013*

**Determine without graphing**

I needed help learning how to find the value.

*March 15, 2013*

**Determine without graphing**

Determine without graphing, whether the given function has a maximum value and then find the value. f(x)=3x^2+30x-1

*March 15, 2013*

**College algebra**

Determine without graphing, whether the given function has a maximum value and then find the value. f(x)=3x^2+18x-6

*March 15, 2013*

**College algebra!**

For the linear function f(x) = 5x + 3 (a) Determine the slope and y-intercept (b) Use the slope and y-intercept to graph the linear function. (c) Determine the average rate of change of the function (d) Determine whether the linear function is increasing, decreasing, or constant.

*March 15, 2013*

**College algebra**

Answer the questions about the following functions. f(x) = 14^2/x^4 + 49 (a) Is the point (-sqrt 7,1) on the graph of f? (b) If x=1, what is f(x)? What point is on the graph of f? (c) If f(x)=1, what is x? what point(s) are on graph of f? (d)What is the domain of f? (e) list ...

*March 14, 2013*

**Algebra**

If you bought 6 pears and 20 oranges and then bought 11 pears and 12 oranges and spent the same each time, how much do oranges cost if the pears are 80 cents each?

*February 27, 2013*

**Math**

Nata spent $28 on 2 DVDs. At this rate, how much would 5 DVDs cost?

*February 11, 2013*

**math**

Suppose 8 out of every 20 students are absent from school less than five days a year. Predict how many students would be absent from school less than five days a year out of 40,000 students.

*February 11, 2013*

**Math**

A survey reported that out of 50 teenagers, 9 said they get their news from a newspaper. At this rate, how many out of 300 teenagers would you expect to get their news from a newspaper?

*February 11, 2013*

**Science**

trying to lift an 8-N load that is attached to a fixed 2 pulley system. Hands move a distance of 1.6m while the load moves 0.8m, what is the force required to lift the load? I am thinking the the answer is 1.6 divided by 0.8 am i on the right track? what is the formula for ...

*February 6, 2013*

**science**

Roughly how many times does earth rotate during each complete revolution? A. 24 B. 28 C.60 D.365 +++ is

*January 29, 2013*

**science**

Roughly how many times does earth rotate during each complete revolution? A. 24 B. 28 C.60 D.365

*January 29, 2013*

**Microbiology**

Discuss some of the physical and chemical factors involved in the composition, and in the preparation, of a culture medium. Nutrient ingredients: ___________________________________________________________ ___________ pH and buffering: ...

*January 18, 2013*