# jenn

Popular questions and responses by jenn-
## Algebra

A financier plans to invest up to $500,000 in two projects. Project A yields a return of 11% on the investment of x dollars, whereas Project B yields a return of 16% on the investment of y dollars. Because the investment in Project B is riskier than the

*asked on June 6, 2018* -
## Math

Ski Market sells snowboards. Ski Market knows that the most people will pay for the snowboards is $129.99. Ski Market is convinced that it needs a 45% markup based on cost. The most that Ski Market can pay to its supplier for the snowboards is:

*asked on October 14, 2019* -
## Algebra 2

The sum of the reciprocals of two consecutive even integers is 9/40. this can be represented by the equation shown. (1/x)+(1/x+2)=9/40 Use the rational equation to determine the integers. Please help!! I have no idea what to do:(

*asked on May 19, 2020* -
## Trig

Find the co terminal angle for 15pi/4

*asked on April 7, 2012* -
## Geometry Question

B is the midpoint of segment AC and D is the midpoint of segment CE. Solve for x, given BD=3x+5 and AE=4x+20. Sorry I couldn't get the link for the picture but, the diagram is a picture of a triangle with a C at the top, and A and E on the bottom angles,

*asked on January 2, 2012* -
## 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.

*asked on September 30, 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

*asked on January 9, 2014* -
## Probs & Stats

a jury of people is chosen from 10 men and 12 women. How many ways can a jury of 6 men and women be chosen?

*asked on October 16, 2007* -
## 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

*asked on August 24, 2014* -
## 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

*asked on June 1, 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?

*asked on February 27, 2013* -
## physics

A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.45 m. A third charge of +4q is located on the x axis at such a place that the net electrostatic force on the charge at the origin doubles, its direction

*asked on January 31, 2010* -
## physics

Two blocks, each of mass m, are attached to the ends of a massless rod which pivots as shown in Figure 8-40. Initially the rod is held in the horizontal position and then released. Calculate the magnitude and direction of the net torque on this system.

*asked on November 10, 2009* -
## chem

which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is

*asked on February 20, 2007* -
## Geometry Triangle Question!

In triangle ACE, G is the centroid and BE=9. Find BG and GE. (segments BE and AD cross in the middle of the triangle, BE overlaps AD and C is at the top of the triangle, and A is on the left corner and E is on the right) Thank You So Much!!! ^0^

*asked on January 3, 2012* -
## 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

*asked on December 11, 2014* -
## 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:

*asked on January 18, 2013* -
## Math

Angle x is in the second quadrant and angle y is in the first quadrant such that sinx=5/13 and cosy=3/5, determine and exact value for cos (x+y). I have no idea how to even start this question. Could someone please help me?

*asked on November 8, 2009* -
## math

Cashew nuts are sold at $15.00/kg. Walnuts are sold at $12.00/kg. What quantities of each nut would a store owner put into a 100-kg barrel so that it could be sold for $13.20/kg? ---------------- 15.00c+12.00w= 31.20 C+w= 100 Are these equations right?

*asked on May 24, 2017* -
## 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?

*asked on April 19, 2013* -
## Physics

At 30.0 m below the surface of the sea (density = 1025 kg/m3), where the temperature is 5.00°C, a diver exhales an air bubble having a volume of 0.80 cm3. If the surface temperature of the sea is 20.0°C, what is the volume of the bubble just before it

*asked on January 19, 2010* -
## to bobpursley

An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air becomes poisoned, a worker can use the apparatus to breath

*asked on March 1, 2007* -
## math

what are all of the subsets for {-8, 4}

*asked on October 9, 2018* -
## Quadratic function

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

*asked on March 19, 2013* -
## Trig

19pi/7 Which quadrant does the terminal side lie on?

*asked on April 7, 2012* -
## Science (Chemistry)

Assuming gasoline is 100% isooctane, with a density of 0.692g/mL, what mass of carbon dioxide is produced by the combustion of 1.2x10^10 gal of gasoline (the approximate annual consumption of gasoline in the U.S.)?

*asked on February 27, 2011* -
## math

the cost per hour of running an assembly line in a manufacturing plant is a function of the number of items produced per hour. The cost function is C(x) = 0.28x^2 - 0.7x + 1 where C(x) is the cost per hour in thousands of dollars and x is the number of

*asked on February 23, 2009* -
## Psychology

How does having a negative self-schema affect one's social interactions? How does social intelligence affect one's responses in any given situation? How might a person's self-guides impact his or her perspective on the world?

*asked on January 22, 2009* -
## Psychology

Children, like adults, experience depression and anxiety. How do the experiences of children who feel anxiety or depression compare to those of adults who feel anxiety or depression? Explain your answer.

*asked on December 9, 2008* -
## organic chemistry

An optical rotation study gives a result of +140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, not -220 degrees.

*asked on November 15, 2008* -
## algebra anyone

How to you compute the intercepts of a quadratic function? For the x-intercept, set x to 0. For the y-intercept(s) (if any), set y to 0.

*asked on June 28, 2005* -
## 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.

*asked on December 6, 2014* -
## 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

*asked on March 15, 2013* -
## Organic Chem

Why is propanol ammonia a better separator of red leaf extract in thin layer chromatography that propanol water?

*asked on December 6, 2011* -
## Physics

292 kg motorcycle is accelerating up a ramp that is 30 degrees above the horizontal. Propulsion force pushing the motorcycle up ramp is 3150 N. Air resistance produces a force of 250 N that opposes the motion. Find that motorcycle's acceleration.

*asked on October 5, 2009* -
## psychology

Can someone help me with these questions, I am having trouble with them. 1. Traumatic events do not always result in a diagnosable psychological disorder. what factors determine how a person may be affected by one such event. 2. What are the four stages in

*asked on November 15, 2008* -
## psychology

Can someone help me with these questions, I am having trouble with them. 3. Traumatic events do not always result in a diagnosable psychological disorder. What factors determine how a person may be affected by one such event? 4. What are the four stages in

*asked on November 15, 2008* -
## Psychology

what are some of the ways that psychologists attempt to explain human behavior?

*asked on October 28, 2008* -
## chem question i need help

I need help on this question. Could someone give me tips on how to solve it? thanks An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes

*asked on February 27, 2007* -
## Algebra 2

Homework help!! ∞ Σn=1 -4(-1/2)^n-1 This converges at -2 2/3, or -2.66– Correct? The formula I used is a1/1-r. then i put -4/(3/2). then multipled by reciprocal. to get -8/3. then -2 2/3. and then to -2.66-

*asked on May 19, 2020* -
## Algebra 2

Are the first four terms of, (∞ Σn=2 (-2)^n-1) 1,-2,-4,-6? Does it Diverge? And is the sum 1/3? This is just checking my answers!

*asked on May 18, 2020* -
## Algebra 2

Are the restrictions of the rational expression, ((x-3)/(x+4))/((x^2-1)/(x)), x≠-4 x≠-1 x≠1 ??

*asked on May 18, 2020* -
## Math

I don't understand what this question is asking: Which digits are in the ones place of a number multiplied by 5? a.0 or 1 b.0 or 5 c.2 or 4 d.2 or 5 Can someone explain what this question is asking, the answer, and why?

*asked on January 17, 2019* -
## statistics

H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will be performed? A. Two-tail testing of a proportion B. One-tail testing of a proportion C. One-tail testing of a mean D. Two-tail testing of a mean ** I'm stuck between A & D. I chose those because

*asked on February 23, 2018* -
## chemistry

Now use the average value of Kb the base dissociation constant of acetate anion to calculate an average value for Ka, the acid dissociation constant of acetic acid. Kb: 1.33x10^-10

*asked on May 19, 2017* -
## 2 math questions, urgent plz help!!

The line with equation a + 2b = 0 coincides with the terminal side of an angle θ in standard position and cos θ

*asked on April 23, 2017* -
## science

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

*asked on January 27, 2015* -
## 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.

*asked on July 28, 2014* -
## Accounting

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

*asked on October 5, 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=

*asked on March 16, 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

*asked on March 15, 2013* -
## physics

A force in the +y direction applied at the point x=2.3m,y=1.4m gives rise to a torque of 39n*m about the origin. Find the magnitude of the force.

*asked on November 16, 2012* -
## physics

A 50 kg uniform ladder, 5.0 m long, is placed against a smooth wall at a height of h = 3.7 m. The base of the ladder rests on a rough horizontal surface whose coefficient of static friction is 0.40. An 80 kg block is suspended from the top rung of the

*asked on November 16, 2012* -
## chemistry

What is the specific heat of a metal if 24.8 g absorbs 65.7 cal of energy and the temperature rises from 20.2 degrees celsius to 24.5 degrees celsius?

*asked on September 4, 2012* -
## Ethics

What are three most important concepts or principles of ethics involved in medicine and the provision of health care services?

*asked on May 11, 2011* -
## math

the width of a basketball court is 1 m more than half the length. If the area of the court is 364 m squared, find the length and width. Sounds easy...but I do not know how to start off the problem.

*asked on April 8, 2011* -
## physics

A freight train has a mass of 1.5 × 107 kg. If the locomotive can exert a constant pull of 4.9×105 N, how long does it take to increase the speed of the train from rest to 74 km/h? Answer in units of min.

*asked on March 30, 2011* -
## physics

what impulse is needed to stop a 45 g mass traveling at 42 m/s?

*asked on November 21, 2010* -
## college health care claim preparation

I am doing an assignment on how to improve patient intake efficiency. Would assigning one staff member the task of dealing with patient registration help? Are there any other ideas that could make the intake process quicker?

*asked on May 1, 2010* -
## organic chemistry

A sample of 2-butanol has a specific rotation of -9.75 degrees. Determine the % ee (enantiomeric excess) and the molecular composition of this sample. The specific rotation of pure (+)-2-butanol is +13.0 degrees.

*asked on November 15, 2008* -
## algebra

Define a variable and write an inequality. Then solve. A local summer baseball team plays 20 games each season. So far, they have won 9 games and lost 2. How many more games must they win this season to win at least 75% of all their games?

*asked on June 28, 2008* -
## Gases - van der waals

It turns out that the van der Waals constant b equals four times the total volume actually occupied by the molecules of a mole of gas. Using this figure, calculate the fraction of volume in a container actually ocupied by Ar atoms (a) at STP, (b) at 100

*asked on December 7, 2006* -
## help!!!!!!!!!!

When factoring a trinomial, why is it necessary to write the trinomials in four terms?" You keep posting this without any thinking. Can this be factored in four terms? 10x^5 + 2x + 17 Perhaps you are meaning factoring the "quadratic" (a polynomial of

*asked on June 16, 2005* -
## MORE MATH

What is the factoring by grouping? When factoring a trinomial, why is it necessary to write the trinomials in four terms? I will be happy to critique your thinking on this. I do not understand to even answer it? How do we determine the common factors in an

*asked on June 14, 2005* -
## Algebra 2

I made a new question because I don’t think the tutor will look back at my reply! Hopefully you guys don’t get mad at me. The sum of the reciprocals of two consecutive even integers is 9/40. this can be represented by the equation shown.

*asked on May 19, 2020* -
## Algebra

Another question! Continuing from my last question about the summation notation, would my first term that i’m finding start at two? I need to find the first four, so the first one (using 1) is 1. The second on (using 2) is -2. The third one (using 3) is

*asked on May 19, 2020* -
## Science

All ______ have heat

*asked on January 10, 2020* -
## Math

Two movers are pushing a large crate. One pushes n with a force of 40.0 n, and the other pushes east with a force of 35.0 n. What force must a third mover exert to keep the crate in equilibrium?

*asked on December 8, 2019* -
## social studies

How did communist and nationalist forces influence China? Select all that apply. A. They encouraged the opening of China to foreign trade. B. They caused political conflict and civil war. C. They worked together to overthrow China's last imperial dynasty.

*asked on April 7, 2019* -
## history

how would america be different today if Thomas Jefferson would have stayed true to his principles? Any links that will help me out here? I don’t have my book with me and it is not multiple choice

*asked on October 12, 2018* -
## english

What format does “forest fire” by Anais Nin use? example: compare-and-contrast

*asked on September 18, 2018* -
## Physics

A small spherical insulator of mass 6.53 × 10-2 kg and charge +0.600 uC is hung by a thin wire of negligible mass. A charge of -0.900 uC is held 0.150 m away from the sphere and directly to the right of it, so the wire makes an angle with the vertical

*asked on February 26, 2018* -
## statistics

Determine which of the following four population size and sample size combinations would not require the use of the finite population correction factor in calculating the standard error. A. N = 1500; n = 300 B. N = 2500; n = 75 C. N = 15,000; n = 1,000 D.

*asked on February 23, 2018* -
## Math

Laura was making a recipe that said the ingredients were for 6 people, but she needed to make it for 8 people. The recipe called for 2 2/3 cups of milk and 1/4 cup of oil. How many cups of these liquid ingredients did she need for 8 people?

*asked on October 19, 2017* -
## Statistics

Williams, Dunsiger, Jennings, and Marcus (2012) conducted a study to test how enhanced mood during exercise can increase the likelihood of physical activity in the future. They reported that at 6 months of physical activity, mood scores (rated on a scale

*asked on September 29, 2017* -
## math

What is the slant height of the cone with the suface area of 200cm2?

*asked on May 29, 2017* -
## math

A boat travels from one port A to port B, travelling 126 km, upstream (against the current) at a uniform speed, and the trip takes 6 hours. On the way back (downstream), the trip only takes 4.5 hours. Set up and solve a system of equations to find out the

*asked on May 22, 2017* -
## maths

A company has 200 employees who are eligible for child care benefits. The company will pay eligible employees 25% of child day care costs, up to a maximum of $500 per child per month. If an employee has 2 children in day care at a cost of $500 per child

*asked on February 28, 2017* -
## MATH, please help

So this is a "Challenge" (we don't have to do it but my mum is making me) we haven't learned it, it's only if you want to do anything harder or more difficult. 1.explain why the ratios 6/9 and 8/12 are in proportion

*asked on December 7, 2016* -
## MATH help ASAP

explain why the ratios 6/9 and 8/12 are in proportion. i don't understand what the question is asking?

*asked on December 7, 2016* -
## chemistry

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

*asked on 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

*asked on 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?

*asked on 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

*asked on 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?

*asked on October 1, 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

*asked on April 25, 2016* -
## Math

tan(θ)/ sec(θ) − cos(θ) Please help!

*asked on 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

*asked on 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

*asked on 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?

*asked on 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.

*asked on November 16, 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

*asked on 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

*asked on 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?

*asked on May 2, 2015* -
## Calculus

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

*asked on March 29, 2015* -
## Trigonometry

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

*asked on 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?

*asked on March 12, 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

*asked on January 20, 2015* -
## english

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

*asked on 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?

*asked on January 6, 2015*