# jean

Newest questions and responses by jean-
## English

My apple trees will never get across. Which figure of speech is this??

*asked on March 28, 2018* -
## chem

A sample of iron absorbs 71.1 J of heat, upon which the temperature of the sample increases from 21.5°C to 28.8°C. If the specific heat of iron is 0.450 J/g-K, what is the mass (in grams) of the sample?

*asked on March 25, 2018* -
## chem

The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2 (g) → 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced?

*asked on March 25, 2018* -
## AP Statistics

I was sick and when I came back to school I received this question as homework and I don't understand it... Jenny is a 60 percent free-throw shooter She gets to shoot a second free throw if and only if she makes her first shot. She can score 0 points( if

*asked on January 2, 2018* -
## Maths

The formula for a simple interest rate is I = PRT and Total Balance = P + I The formula for compound interest is B = P × (1 + 〖r/n)〗^nt Adam invests £55,000 at interest rate of 4% per annum

*asked on December 20, 2017* -
## Chemistry

An unknown element Q has two known isotopes: 60Q and 63Q. If the average atomic mass is 62.0 amu, what are the relative percentages of the isotopes?

*asked on October 26, 2017* -
## statistics

Car seat belts are tested for strength, and it is found the results are normally distributed with a mean of 2400 lb and a standard deviation of 400 lb. Using the 68-95-99.7 rule, find the percentage of scores between 1600 lb and 3200 lb.

*asked on August 5, 2017* -
## physics

the rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*10^11m, and the radius of the sun is 6.96 * 10^8m. if the sun radiates as an ideal black body (e=1), what

*asked on May 7, 2017* -
## 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

*asked on 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.

*asked on 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?

*asked on January 22, 2016* -
## Statistics

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

*asked on 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

*asked on December 8, 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

*asked on 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

*asked on 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?

*asked on 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.

*asked on August 20, 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

*asked on 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

*asked on August 12, 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 :-)

*asked on August 11, 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?

*asked on 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

*asked on 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?

*asked on 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?

*asked on August 7, 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?

*asked on August 7, 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

*asked on August 7, 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?

*asked on August 5, 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.

*asked on August 5, 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.

*asked on August 2, 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?

*asked on June 30, 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

*asked on 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?

*asked on April 24, 2015* -
## math

solve: 2x + 5 = 3x - 9

*asked on April 4, 2015* -
## Trig

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

*asked on March 11, 2015* -
## calculus

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

*asked on October 15, 2014* -
## calculus

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

*asked on September 24, 2014* -
## math

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

*asked on September 24, 2014* -
## math

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

*asked on September 24, 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.

*asked on September 24, 2014* -
## math

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

*asked on 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?

*asked on September 18, 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.

*asked on September 12, 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!

*asked on September 11, 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

*asked on September 4, 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?

*asked on 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?

*asked on May 15, 2014* -
## Milford DE

#6 Plot Story map for the other wife

*asked on March 27, 2014* -
## Visual Basic

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

*asked on March 5, 2014* -
## Computers

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

*asked on 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

*asked on February 13, 2014* -
## 20th century Europe

The 20th century European dominance was replaced by what?

*asked on February 2, 2014* -
## american government

the professional qualification model in the selection of judges holds that

*asked on January 13, 2014* -
## 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.)

*asked on 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.

*asked on July 1, 2013* -
## algebra

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

*asked on May 30, 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?

*asked on May 19, 2013* -
## American National government

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

*asked on May 5, 2013* -
## math

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

*asked on April 4, 2013* -
## Intro to Logic

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

*asked on March 30, 2013* -
## math

simplifying expressions

*asked on 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

*asked on February 13, 2013* -
## political science

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

*asked on February 5, 2013* -
## science

What is science

*asked on January 28, 2013* -
## chemistry

balance net Ionic solution AgNo3 + NaOH

*asked on January 26, 2013* -
## political science

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

*asked on January 17, 2013* -
## political science

what are the argument for and against politics being a science

*asked on January 16, 2013* -
## political science

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

*asked on 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

*asked on 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

*asked on 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

*asked on December 27, 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

*asked on 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?

*asked on 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

*asked on 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

*asked on 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

*asked on 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

*asked on 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

*asked on December 9, 2012* -
## math

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

*asked on December 8, 2012* -
## math

add the fractions 2/3, 3/8, and 5/12 and reduce your answer to the lowest terms

*asked on December 8, 2012* -
## math

a lumberyard makes picnic tables for $87.00 and sells them for $127.89. what is the percent markupbon each picnic table based on cost?

*asked on December 8, 2012* -
## math

convert 5/8 to a decimal

*asked on December 8, 2012* -
## math

convert 5/8 to a decimal

*asked on December 8, 2012* -
## Business Math

John Roe, an employee of the Gap, loans $3000 to another employee at the store. He will be repaid at the end of 4 years with interest at 6% compounded quartly. How much will John be repaid?

*asked on December 5, 2012* -
## Business Math

Lee Willis loaned Audrey Chin $16000 to open Snip Its Hair Salon. After 6 years, Audrey will repay Lee with 8% interest compounded quartly. How much will Lee receive at the end of 6 years?

*asked on December 5, 2012* -
## Business Math

Lee Holmes deposited $ 15,000 in a new savings account at 9% interest compounded semiannually, At the beginning of year 4, Lee deposites an additional $40000 at 9% interest compounded semiannually. At the end of the 6 years what is the balance in Lee;s

*asked on December 5, 2012* -
## Chemistry

find the volume of 56.4 g of a substance that has a density of 2.42 g/mL

*asked on November 8, 2012* -
## economics

According to your text, our main sources of ethical standards are religion and A. philosophy. C. culture. B. social habit. D. circumstances

*asked on November 1, 2012* -
## physics

A 301-kg motorcycle is accelerating up along a ramp that is inclined 30.0º above the horizontal. The propulsion force pushing the motorcycle up the ramp is 3420 N, and air resistance produces a force of 230 N that opposes the motion. Find the magnitude of

*asked on October 3, 2012* -
## math

a rectangular garden has a length of 9 meters and a width of 7 meters. inside the garden is a square patch of roses. the patch is a square with sides of 4 meters. what is the area of the part of the garden NOT covered by roses?

*asked on September 30, 2012* -
## psychology

Write a 350- to 700-word paper that explains which of Erikson’s eight stages of life you believe you are currently in. Explain why you think you are at that stage and describe that stage in your paper. What is the central question posed during that

*asked on September 17, 2012* -
## Physics

A plane leaves Seattle, flies 85 mi at 22 degrees north of east, and then changes direction to 48 degrees south of east. After flying 115 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches

*asked on September 12, 2012* -
## physics

A plane leaves Seattle, flies 85 mi at 22 degrees north of east, and then changes direction to 48 degrees south of east. After flying 115 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches

*asked on September 12, 2012* -
## Pharmacy Math

If you diluted 95ml of a 7% benzocaine lotion to 5% how much could you produce? ___

*asked on July 30, 2012* -
## Pharmacy Math

How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____

*asked on July 30, 2012* -
## Pharmacy Math

35ml of active ingredient is mixed with distilled water to total 300ml. What is the final concentration (v/v)? ____

*asked on July 30, 2012* -
## Pharmacy Math

320ml of active ingredient is added to 680ml of an alcohol based solution. What is the final strength (v/v)? ___

*asked on July 30, 2012* -
## pharmacy math

15g of potassium chloride is diluted in 2L of sterile water for injection. What is the final perccent strength (w/v)? ____

*asked on July 30, 2012* -
## Calc

Compute the derivative of f(x)=5^x^2+1 using logarithmic differentiation.

*asked on July 18, 2012* -
## Business Calculus

Determine the intervals where f(x)=e^-x^2/2 is increasing and decreasing

*asked on July 18, 2012* -
## math forgot questions

a new refrigerator costs $2495. It may be purchased for $95 down and 24 monthly payments of $125 eachI forgot questions What is the total cost of the refrigerator if you finance it? b) What are the finance charges (total interest)?

*asked on July 7, 2012*