# Posts by Jean

Total # Posts: 495

**Math**

In a survey of students about favorite sports the results include 23 who like tennis 24 like football 7 like tennis and football 20 like football and baseball 5 like all three sports 9 like no sports. How many students like only tennis and football? How many like only tennis ...

*October 1, 2016*

**chemistry**

Consider the equilibrium reaction CO(g)+H2O(g)⇋CO2(g)+H2(g) Determine how each change in the left-hand column will stress the system and in which direction the equilibrium reaction will shift in response.

*April 18, 2016*

**physics**

How much effort force would be needed to roll a barrel with a resistance force of 100N up an inclined plane with a height of 2m and an inclined plane of 8m?

*January 22, 2016*

**Statistics**

what is the standard deviation for 57,61,57,57,58,57,61

*January 10, 2016*

**precalc**

Find the standard form equation for each ellipse described. 1) Major vertices at (0, 3) and (0, -3), minor vertices at (2, 0) and (-2, 0) 2) Major vertices at (7, 0) and (-7, 0), foci at (5, 0) and (-5, 0) 3) Minor vertices at (-2, -3) and (-2, -11), foci at (1, -7) and (-5, -7)

*December 8, 2015*

**statistics**

16/2704 =1/169 or 0.0059 144/2704 = 9/169 or 0.0533

*October 21, 2015*

**Intro to Ecology**

Global estimates of denitrification in terrestrial ecosystems vary widely but are of the order 200*102 g/yr, and more than half of that total occurs in wetland ecosystems. If restoration results in an increase in wetland area by approximately 25%, it would be expected that ...

*October 20, 2015*

**math**

7x-3y+4z=18 13x+6y+8z=30 11x-9y-12z=16 Find x,y,z please show the solution pleaseee

*October 4, 2015*

**chemistry**

4.3 cm would be 1.69 in

*October 4, 2015*

**statistics**

A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the correct answer. What is the probability that a student gets 7 to 11 correct answer?

*September 10, 2015*

**Solid Mensuration**

A triangle has a base of 16 inches and an altitude of 8 inches. Find the dimensions of the largest rectangle that can be inscribed in the triangle if the base of the rectangle coincides with the base of the triangle.

*August 19, 2015*

**Calculus**

Thank You!!

*August 12, 2015*

**Calculus**

The balloon leaves the ground 80 ft. from an observer and rises vertically upward at 5 ft/s. (a) How fast is the balloon receding from the observer after 12 seconds? (b) find the corresponding acceleration? How do I sketch it? and what equation should I use? Please show the ...

*August 12, 2015*

**Calculus**

A man 5.5 ft tall walks away from a lamp post 10 ft high at the rate of 8 ft/s. (a) How fast does his shadow lengthen? (b) How fast does the tip of the shadow move? Can you please tell me what method/s you used to come up with a solution? I wasn't sure about the sketch I ...

*August 12, 2015*

**Calculus**

why was it multiplied to 10?

*August 10, 2015*

**calculus**

find the equation of the curve for which y'''=24x-6 if the curve passes through (-1,8) and is tangent to the line y=4x at (1,4). help please thanks :-)

*August 10, 2015*

**calculus**

if the driver of a car wishes to increase his speed from 20 mph to 50 mph while traveling a distance of 528 ft., what constant acceleration should he maintain?

*August 10, 2015*

**calculus**

a particle starts from rest and moves along a straight line with an acceleration equal to 24-15√t where distance and time are measured in terms of feet and seconds respectively. with what acceleration will the particle return to the starting point? help please thank you :-)

*August 10, 2015*

**calculus**

it's 904 ft. thank you :-)

*August 10, 2015*

**calculus**

a stone dropped from a balloon which was rising at the rate of 15 ft./sec. reached the ground in 8 seconds. how high was the balloon when the stone was dropped?

*August 10, 2015*

**calculus**

If the driver of a car wishes to increase his speed from 20 mph to 50 mph while traveling a distance of 528 ft., what constant acceleration should he maintain?

*August 6, 2015*

**calculus**

a particle starts from rest and moves along a straight line with an acceleration equal to 24-15√t where distance and time are measured in terms of feet and seconds respectively. with what acceleration will the particle return to the starting point?

*August 6, 2015*

**calculus**

A stone dropped from a ballon which was rising at the rate of 15 ft./sec. reached the ground in 8 seconds. how high was the ballon when the stone was dropped? please help :-) thank you

*August 6, 2015*

**calculus**

Thank you. You’re so helpful.

*August 4, 2015*

**calculus**

a parachutist falling at the rate of 15 ft./sec. drops a stone. if he was 904 ft. above the ground when the stone was dropped, how long would it take the stone to reach the ground?

*August 4, 2015*

**calculus**

Thank you very, very much. I'm really grateful.

*August 4, 2015*

**calculus**

a = 1/(t√t)

*August 4, 2015*

**calculus**

a particle moves according to the law a=1/t √t. if s=8 when t=1. and s=16 when t=4. find v when t=9.

*August 4, 2015*

**SLCS**

Paul and Juston are carrying a sack or rice weighing 6.02x10^2 N on a pole between them. If the pole is 2.0 m long and the load is .50m away from Juston,what force should each boy exert to make it equilibrium. Neclect the weight of the pole.

*August 2, 2015*

**Nutrition**

:can be converted to vitamin D, the answer is a.

*July 19, 2015*

**Math**

Serena is an account executive. She receives a base pay of $18 an hour plus a 15% bonus for all the sales she generates. Last week she generated $1,200 worth of business. What is the minimum number of hours she could have worked to make $500?

*June 30, 2015*

**Pharmacy Tech**

ah ok so basically warnings- can cause these symtoms and adverse reactions- things that was observed during clinical trials? that would be the difference?

*April 28, 2015*

**Pharmacy Tech**

20.) To find out if a drug causes nausea, you would look in this section of the drug monograph. a) adverse reactions b) contraindications c) how supplied d) warnings I am leaning towards a but not sure..I could also think it could be d as well...am confused and i keep ...

*April 28, 2015*

**physics**

a gun converts 200J of stored energy into kinetic energy of the 0.02kg bullet. What is the speed of the bullet as it leaves the gun? If the gun is fired straight up, how high will the bullet go?

*April 23, 2015*

**Physics**

60mph converts into 26.82m/s, a= (0-26.82 m/s) -26.82 m/s but don't understand how to get answer in Newtons which are kg m/s^2

*April 23, 2015*

**math**

solve: 2x + 5 = 3x - 9

*April 4, 2015*

**Trig**

How do you derive this identity? Cos(t)=1-sin^2(t/2)

*March 11, 2015*

**Persuasive Essay**

Should violent video games be prohibited from sale?

*October 18, 2014*

**calculus**

Use iterated integral to find the area enclosed by r=2sin2(theta). How do i graph this?

*October 15, 2014*

**calculus**

Z=square root of(x^2+y^2) + xy Find the partial derivatives: x, xx, y, yy, xy. Thanks.

*September 24, 2014*

**math**

The domain and range of ln(4-x-y). Thanks.

*September 24, 2014*

**math**

Z=square root of (x^2+y^2) + xy Find the partial derivatives: x, xx, y, yy, xy. Thanks.

*September 24, 2014*

**math**

But why wouldnt the answer be just xe^y cos(xy)? if the partial derivative with respect to x is just ye^y cos(xy).

*September 23, 2014*

**math**

The partial derivative with respect to y for z=e^y sin(xy) is: zy= xe^y cos(xy) + e^y sin(xy) How do i get to this answer? Thanks.

*September 23, 2014*

**math**

Find the rectangle with the maximum area inside the ellipse x^2/16 + y^2/4=1. Thanks.

*September 21, 2014*

**physics**

If a 2kg car with a momentum of 12kg m/s collides with a stationary 4kg car, the total momentum after the collision will be?

*September 18, 2014*

**Statistics – Lab Week 2**

Thanks for the help...

*September 12, 2014*

**Statistics ¨C Lab Week 2**

The corelation coefficient is: r=0.9982 Step 1: Find X⋅Y, X^ 2 and Y ^2 as it was done in the table below. X Y X⋅Y X⋅X Y⋅Y 67.273 69.78 4694.30994 4525.656529 4869.2484 0.764 1.40 1.0696 0.583696 1.96 2.533 4.21 10.66393 6.416089 17.7241 63.000 61.00 ...

*September 12, 2014*

**Statistics – Lab Week 2**

11. Using the empirical rule, 68% of male heights should be between what two values? Either show work or explain how your answer was calculated.

*September 12, 2014*

**Algebra**

x(a+b+2) (x+3)(a+b)

*September 12, 2014*

**equations**

Exact result: 3N/16 = 24

*September 12, 2014*

**math**

True

*September 12, 2014*

**Algebra**

Solution for the variable b b=a

*September 12, 2014*

**Science**

Yes second answer is correct.

*September 11, 2014*

**physics**

The vertical acceleration of a projectile A)equals g pointing sometimes upwards and other times downwards. B)equals g pointing upwards C)is zero. D)equals g pointing downwards E)continuously increases. Thanks!

*September 11, 2014*

**Accounting 9**

41

*September 9, 2014*

**physics**

Thanks!

*September 3, 2014*

**physics**

A child, who is 45 m from the bank of a river is being carried downstream by the river's swift current of 1.0 m/s. As the child passes a lifeguard on the river's bank, the lifeguard starts swimming in a straight line until she reaches the child at a point downstream. ...

*September 3, 2014*

**algebra**

what is the inner diameter of a washer whose outside is l inch and thickness is 3/16 inche

*August 13, 2014*

**Math**

If a hallway is 90 feet long & 7 feet wide and it takes 1/2 ounce of cleaning solution to clean 1 square foot, how much cleaning solution is needed to clean the hallway?

*July 10, 2014*

**physics**

croquet ball must have a set mass of 0.50 kg. a red ball moving at 10.0 m/s, strikes an at-rest green ball head on. The red ball continues moving at 1.5 m/s after it hits the green ball. What is the final speed of the green ball?

*May 15, 2014*

**Milford DE**

#6 Plot Story map for the other wife

*March 26, 2014*

**Pre Algebra**

cone

*March 25, 2014*

**Visual Basic**

Write a statement that assigns the length of an array named strAddressBook to a variable named intAddressCount.

*March 5, 2014*

**Computers**

Write a statement that assigns the length of an array named strAddressBook to a variable named intAddressCount.

*March 5, 2014*

**chemistry**

very hot sinc will react with steam to form zinc oxide and hydrogen. If 5.4 liters of hydrogen was used to use up 20 g of zinc completely. What is the percent yield of this process

*February 12, 2014*

**20th century Europe**

The European dominance was replaced by what is also known as the globalization?

*February 1, 2014*

**20th century Europe**

to describe the international events and the economic, intellectual and cultural developments in the twentiet-first century

*February 1, 2014*

**20th century Europe**

The 20th century European dominance was replaced by what?

*February 1, 2014*

**american government**

the professional qualification model in the selection of judges holds that

*January 12, 2014*

**Science >.<**

if a wave is traveling at 60cm/second and has a wavelength of 15cm,what is the frequency

*October 31, 2013*

**Business math**

Using the price per dinner that you determined in the previous question, calculate the following. If Epicure offers a $1-off coupon in a newspaper advertisement, what markdown percent does the coupon represent? (Round percent to the nearest tenth.)

*September 13, 2013*

**Physics**

A rock is ejected vertically upward at 40 m/s. At what time is the rock moving at 20 m/s upward.

*July 1, 2013*

**algebra**

Question Four x - 7y = 15 -3x + 21y = - 45

*May 29, 2013*

**economics**

Bob and his dad visited the hardware store on Saturday. They observed the following transactions: Mr. Harris bought 4 for 0.50, Mrs. Clarke bought 21 for $1.00, Mr. Montaro bought 1,134 for $2.00 and Ms. Park bought 450 for $1.50 What were they buying?

*May 19, 2013*

**American National government**

According to the trustee model of representation, members of Congress must do what

*May 5, 2013*

**math**

find the value of x in the equation 6x +4(70-x)=300

*April 4, 2013*

**Intro to Logic**

10. A strongly supported claim in science should be regarded as

*March 30, 2013*

**math**

simplifying expressions

*February 23, 2013*

**macro-economics**

1.In an attempt to curb the problem of unemployment and win the forthcoming elections the government of the republic of zambia has decided to hire unemployed workers who had previously been receiving unemployment benefits as government employees and will now pay them to do ...

*February 13, 2013*

**political science**

Critically evaluate plato's justification of rule by philosopher kings. Please help its needed the soonest

*February 5, 2013*

**science**

What is science

*January 27, 2013*

**chemistry**

balance net Ionic solution AgNo3 + NaOH

*January 25, 2013*

**political science**

is politics an art or a science? give proper reasons for chosen side.(its an essay)

*January 17, 2013*

**political science**

what are the argument for and against politics being a science

*January 16, 2013*

**political science**

Is politics a science or not? Give a reasons for answer

*January 15, 2013*

**economics**

John has a job that requires him to travel 3 of every 4 weeks. He has an annual budget and can travel either by train or by plaine. The airline on which he typically flies has a frequent traveler programme that reduces the cost of his tickets according to the number of milels ...

*January 2, 2013*

**economics**

John has a job that requires him to travel 3 of every 4 weeks. He has an annual budget and can travel either by train or by plaine. The airline on which he typically flies has a frequent traveler programme that reduces the cost of his tickets according to the number of milels ...

*January 2, 2013*

**Business Math**

Being inventory of 12 sets of paints at a cost of $1.50 each. During the year the store purchased 4 sets at $1.60, 6 sets at $2.20, 6 sets at $2.50, and 10 sets at $3.00. By the end of the year, 25 sets were sold. Caculate the number of paint sets in stock and the cost of ...

*December 26, 2012*

**Business Math**

Lee Corp. purchased 10 key chains on January 1, 2010 for $9.00 each and 5 key chains were purchased on December 1, 2010 for $10.00. Seven were sold. What would be the inventory amount for LIFO, what would be the inventory amount for FIFO

*December 26, 2012*

**Business Math**

Assume you lease a $45,000 BMW. Using a straight- line method with a 3- year ueful life and is a $16, 675 residual value, what is the book value of the BMW after the first year?

*December 20, 2012*

**Business Math**

Jim Clinnin purchased a used RV with 19,000 miles for $46,000. Originally the RV sold for $70,000 with a residual value of $20,000. After subtracting the residual value, depreciation allowance per mile was $.86. How much was Jim's purchase price over or below the book value?

*December 20, 2012*

**Business Math**

Jim Company bought a machine for $36,000with an estimated lofe of 5 years. The residual value of the machine is $6,000 Calculate (a) the annual depreciation and (b) the book value at the end of year 3. Assume straight-line depreciation

*December 20, 2012*

**Business Math**

From the following facts, complete a depreciation schedule using thee straight - line cost of Highlander- $30,000 residual value- $6,000 estimated life- 8 years

*December 20, 2012*

**business**

A usefful personal and business investment site with in-depth detail on personal financial planning. After reading a March 19,2009 , article"Preparing a Portfolio for Retirement," Arlene Supple, 47 years old, is evaluating her retirement portifolio. She paid her ...

*December 9, 2012*

**math**

a computer store sold a total of 300 items last month. the store sold six times as amny hard drives as they did CD-ROM drives, andhalf as many floppy drives as hard drives. based on this information, how many of each items were sold

*December 9, 2012*

**math**

103/5

*December 8, 2012*

**math**

10 12/15

*December 8, 2012*

**math**

subtract the fraction 74/5 from the fraction 18 6/15 and reduce your answer to the lowest terms.

*December 8, 2012*