# tanya

Popular questions and responses by tanya-
## Physics Help Please --- Urgent

A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an insect is now placed 16 cm from this lens, how far FROM THE INSECT will its image be formed? A) 64 cm B) 72 cm C) 32 cm D) 96 cm E) 48 cm

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

In a zero order reaction ,20% of the reaction complete in 10s .How much time it will take to complete 50% of the reaction?

*asked on May 27, 2015* -
## history

the reign of terror was a necessary evil discuss

*asked on June 22, 2015* -
## Maths

Draw a graph for this equation y=5x+3

*asked on August 7, 2020* -
## chemistry

A|A+3(0.1)||B+2(0.01m)|B GIVEN E°A|A+3=0.75v E°B|B+2=0.45v

*asked on May 27, 2015* -
## calculus help

Evaluate!!!! integral -10 to 10 ((2e^x)/(sinhx+coshx))dx Thanks!

*asked on May 8, 2014* -
## Chemistry

0.24g of a volatile substance,upon vaporisation,gives 45ml vapour at NTP what will be the vapour density of the substance?

*asked on March 22, 2015* -
## CHEMISTRY

A gaseous mixture was prepared by taking equal mole of CO and N2 .if the total pressure of the mixture was found 1 atmosphere ,the partial pressure of nitrogen (N2) in the mixture is.

*asked on March 22, 2015* -
## Physics Help Please --- Telescope

An astronomical refracting telescope is made from two lenses. the objective lens has a focal length of 114 cm, and the eyepiece lens has a focal length of 17 cm. a) What is the total length of the telescope? b) What is the angular magnification of the

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

a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ???? Then improve your estimate by using six rectangles. R6= ????? Sketch the curve and the approximating rectangles for R3. Sketch the

*asked on April 23, 2014* -
## CHEMISTRY HELP !!!!

NH4CL , ZNCL2 , KAL(SO4)2 FIND THE FOLLOWING NET IONIC EQUATION FOR HYDROLYSIS EXPRESSION FOR EQUILIBRIUM CONSTANT (KA OR KB) VALUE THANK YOU SO MUCH!!!

*asked on April 10, 2014* -
## Physics

Which of the following is the correct relationship between the electric field strength and the potential difference?

*asked on May 31, 2013* -
## psychology

Such tests as the Rorschach Inkblot Test and the Thematic Apperception Test are examples of what? projective measures self-report measures objective measures observational measures

*asked on December 21, 2009* -
## Chemistry

Hydrazene can be used in fuel cell N2H4(aq)+o2(g)->N2(g)+2H2O(l) IfΔG°for this reaction is -600kj what will be the E°for the cell?

*asked on May 27, 2015* -
## CHEMISTRY

At 25°C and 730 mm pressure,380 ml of dry oxygen was collected.If the temperature is constant ,what volume will the oxygen occupy at 760 mm pressure ? ANSWER- 365ml

*asked on March 22, 2015* -
## statistics

The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years what percentage of individual aircraft have ages greater than 15 years assume that a random sample of 49 aircraft is selected and the

*asked on April 24, 2012* -
## Calculus Help Please!!!

In a murder investigation, the temperature of the corpse was 32.5 C at 1:30pm and 30.3 C an hour later. Normal body temperature is 37.0 C and the temperature of the surrounding was 20.0 C. When did the murder take place? PLEASE SHOW STEP BY STEP

*asked on March 27, 2014* -
## High Point

a sign is in the shape of rhombus with a 60 degree angle and sides of 9cm long. Find its are to nearest tenth?

*asked on January 24, 2012* -
## statistic

Quiz has 6 questions. Each question has five possible answers, only one of each 5 answers is correct. If student randomly guesses on all six questions, what is the probability to answer 2 questions right? Tip: first, you have to define parameters of

*asked on December 4, 2010* -
## statistics help...please

i have no idea! The real estate assessor for a country government wants to study various characteristics of single family houses in the country. A random sample of 70 houses reveals the following: the mean is 1759, standard deviation is 380 and 42 houses

*asked on April 3, 2008* -
## math

the distance between new york city and boston is 189.9 miles as the crow flies. how far is it in kilometers? 117.7 kilometers 305.7 kilometers 417.8 kilometers 1,899 kilometers

*asked on November 7, 2015* -
## Chemistry

the rate of diffusion of a gas having molecular weight just double of hydrogen gas is 30 ml/s.the rate of diffusion of hydrogen gas will be

*asked on April 2, 2015* -
## verbal linear equations

a taxi costs $2.75 for the first quarter of a mile and $0.85 for each subsequent quarter mile.A ride that cost $23.15 is how many miles longer than a ride that costs $17.20?(please i don't want example show me how u work it out )

*asked on February 5, 2012* -
## Finance

a corporation had year end 2004 and 2005 retained earnings balances of $320,000 and $400,000, respectively. The firm reported net profits after taxes of $100,000 in 2005. the firm paid dividends in 2005 ofwhat

*asked on August 11, 2011* -
## Math

A Garden has a many trees in each row as there are rows in the garden if the total number of trees in the garden is 2500 find the number of rows of tree

*asked on July 11, 2019* -
## chemistry

CHEMICAL KINETICS The rate of reaction 2N₂O5->4NO₂+O₂ can be written in three ways -d[N₂O5]/dt= k[N₂O5] d[NO₂]/dt= k'[N₂O5] d[O₂]/dt =k"[N₂O5] The relationship between k and k' and between k and k" are ?

*asked on May 28, 2015* -
## CHEMISTRY

Two gases A and B having the same volume diffuse through a porous in 20 and 10 seconds respectively .The molecular mass of A is 49u.Molecular mass of B will be

*asked on March 23, 2015* -
## math

A water heater has a diameter of 18 inches. It sits in a drain pan that has a diameter of 22 inches and a height of 2 inches, as modeled in the diagram below. Water that leaks out of the water heater sits in the drain pan. Which of the following is closest

*asked on March 19, 2014* -
## Algebra

Given h(x)= 2x + 2 and f(x)=1/2 x + 4, evaluate the composite function. h[f(x)]

*asked on May 1, 2013* -
## Algebra

Given f(x)= 2x^2 – 1 and g(x) = –2x + 1, find the following. f(3) − g(3)

*asked on May 1, 2013* -
## chemistry

how much heat is required to vaporize 343g of liquid ethanol at its boiling point?

*asked on March 25, 2013* -
## Chemistry

Exactly 100 mL of 0.14 M nitrous acid (HNO2) are titrated with a 0.14 M NaOH solution. Calculate the pH for the following. (a) the initial solution (b) the point at which 80 mL of the base has been added (c) the equivalence point (d) the point at which 105

*asked on March 17, 2012* -
## help in math

solve and check each of the following quadratic equation (1) x^2=6x (2) x^2=3x (3)x^2=17x (4) x^2=5x+6 (5) x^2+9x=10

*asked on February 15, 2012* -
## physics

a cylinder of diameter 1cm at 30degree celcius is to slid into a hole on a steel plate. the hole has a diameter of 0.9997 cm at 30 degree celcius. to what temperature must be the plate be heated when steel has the alpha 1.1X10^-5/degree celcius

*asked on September 2, 2011* -
## bus475

One characteristic of an oligopoly market structure is:

*asked on November 13, 2010* -
## chemistry

2NH3+H2SO4---> (NH4)2SO4 Calculate the mass of ammonia required to produce 125g of ammonium sulfate.|:

*asked on March 31, 2010* -
## Biology

Produce a nucleotide sequence with a single base-pair substitution mutation that still produces the same amino acid sequence. Indicate the site of the mutation and explain why the amino acid sequence is not affected.

*asked on March 15, 2009* -
## Maths

A survey conducted with 30 students revealed that:20 has cell phone 16 has tsblets 4 has neither 2x has both...calculate the value of x

*asked on December 6, 2016* -
## Math

An alloy is made up of 25% copper, 30% iron an rest being zinc. Find the mass of zinc in 720 gm of the alloy

*asked on December 3, 2016* -
## statistics

In a recent season, the population standard deviation of the yards per carry for all running backs was 1.241.24. The yards per carry of 25 randomly selected running backs are shown below. Assume the yards per carry are normally distributed. 1.81.8

*asked on November 22, 2015* -
## afrikaans (AFK503/101)

Hi there, can anyone pls help me with AFK1503/101 - 2015. I am seeking an English version of this assignment pls, is there an English one available? if there is pls provide me with a website address to get access. Thank you. Tanya

*asked on August 12, 2015* -
## CHEMISTRY

The pressure exerted by 6.0g of methane gas in a 0.03m3 vessel at 129degreeC is.

*asked on March 22, 2015* -
## Calculus Help Please!!!

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x Y1= I

*asked on April 4, 2014* -
## Medical Billing and Coding

Had to develop a paragraph using clear, varied sentences containing concrete words and transitions or connectives to create a logical flow. Need assistance in the following paragraph that describes on particular experience I had that inspired you or guided

*asked on December 10, 2013* -
## Math

(2-4i)-(-4+i)=

*asked on November 10, 2013* -
## ,math

show that sec theta(cosec theta) - cot theta = tan theta

*asked on May 3, 2013* -
## Algebra

Solve for x. Round to the nearest hundredth. ln x = − 4/9 x =

*asked on May 3, 2013* -
## science

In the laboratory small zircon crystals were separated from granite (K). Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 × 108 years), estimate the age of the granite in Ma to two significant

*asked on March 10, 2013* -
## physics

A box of books weighing 324 N is shoved across the floor by a force of 527 N exerted downward at an angle of 35 below the hori- zontal. The acceleration of gravity is 9.81 m/s2 . If μk between the box and the floor is 0.59, how long does it take to move

*asked on October 15, 2012* -
## physics

In the design of a supermarket, there are to be several ramps connecting different parts of the store. Customers will have to push grocery carts up the ramps. A grocery cart has a mass of 30kg. The coefficient of friction is .10. Assume that the shoppers

*asked on September 11, 2012* -
## statistics

Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both

*asked on June 28, 2012* -
## solving algebraic equation

a movie theater charges $9 for an adults ticket and $5.00 for a child ticket. on a recent night the sale of child's tickets was two times the sale of an adults tickets. if the total amount collected for ticket sales was not more than $3800 what is the

*asked on February 8, 2012* -
## algebraic equation and inaqualities

in a triangle XYZ,the measure of angle Y is 40 more than the measure of angle X.the measure of angle Z is 10 less than three times the measure of angle X.find the measure of angle X

*asked on February 6, 2012* -
## algebra verbal linear equation

Allison has a square root flower garden and Lauren has a rectangular flower garden the width of the rectangular garden is 2 yards less than a side of the squaare garden and the length of the rectangular garden is 5 yards more than a side of the square

*asked on February 5, 2012* -
## English

Describe the role that Huck’s conscience plays in the first half of Twain’s novel.

*asked on October 25, 2011* -
## english

How does the issue of slavery become a concern in Huck's life? How does Huck deal with this controversial issue?

*asked on October 25, 2011* -
## english

How does Huck display imagination, intelligence, creativity, and a sense of humor in the first half of Twain’s novel?

*asked on October 25, 2011* -
## English

Identify and describe Huck’s opinions of “sivilization,” education, and religion.

*asked on October 25, 2011* -
## soc 110

a. In urban areas across our country, identify at least three technologies that Americans have become dependent upon in their daily lives. b. Using the technologies that you described in (a), discuss at least one advantage and one disadvantage that people

*asked on April 15, 2011* -
## Finance

What is a significant disadvantage of the payback period? a. does not properly consider the time value of money, b. Is complicated to explain, c. Increase firm risk, or d.Provides a measure if liquidity.

*asked on March 24, 2011* -
## math

Given the expression (3s-4)(4s+5), explain in words the steps taken to completely simplify the expression

*asked on January 16, 2011* -
## statistics - math

Sixty percent of the students at a particular community college are female. If 13 students at that community college are selected at random, find the probability that 5 or 6 students will be female. Use Appendix Table or Excel function for Binomial

*asked on December 4, 2010* -
## Popular American Culture

Prepare a 350 to 700-word paper in which you examine trends in popular American culture. In your examination, be sure to describe at least one trend from the following areas: a. Social b. Political c. Personal d. Religious

*asked on August 7, 2010* -
## Algebra

Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles

*asked on March 20, 2010* -
## Math

Find an equation of the line that passes through the given point and has the given slope Express ur answer in slope-intercept form. (8,0), m=-3

*asked on February 18, 2010* -
## psychology

The observational learning approach states that stereotypes and prejudices are acquired through what? repressing of wants and needs excessively experiencing maturation of innate ideas watching and imitating a model’s behavior pairing conditioned and

*asked on December 20, 2009* -
## physics

a sled slides down a frictionless hill. if the sled starts from rest at the top, its speed is 7.5 m/s. a.) on a second run , the sled starts with a speed of 1.5 m/s at the top.. will it end with less than 9 m/s, 9 m/s, or more than 9 m/s b.) find the speed

*asked on December 2, 2009* -
## Algebra

Use the formula h= -16t^2+250t to model the height 'h' in feet of a model rocket 't' seconds after it has luanched. Determine when the rocket will reach a height of 900 feet.

*asked on April 15, 2008* -
## Stat help

An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min.

*asked on April 3, 2008* -
## Statistics...help

An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min.

*asked on April 3, 2008* -
## religious studies

Who was Jesus'most beloved desciple?

*asked on February 15, 2008* -
## Math

5ml is how many liters

*asked on December 26, 2019* -
## verbs

A Superblade was used at the 2 o'clock position, and the anterior chamber was entered find the verbs

*asked on December 18, 2019* -
## Math

A man spend one third of his wages on food and one fifth on rent. A. What fraction does he spend on food and rent together? B. What fraction of his wages is left to spend on other things? C. If in a month the same man spend $450 on food, what is his

*asked on June 10, 2019* -
## Trig

Tan theta / 1- tan theta -cot theta /1-cot theta =cos theta + sin theta/cos theta -sin theta

*asked on March 29, 2018* -
## History

Critically access Robespierre's contributions to the revolution

*asked on April 25, 2017* -
## Math

a rectangle of board measures 21 m by 70 cm. Circular plates are to be cut from the board of diameter 14 cm. how many plates and board is left

*asked on January 16, 2017* -
## Math

Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Fknd her aggregate marks.

*asked on December 3, 2016* -
## Math

A man takes commission at the rate of 2% on first 50,000, 7% on next 50,000 and 0.5% on remaining price. Find bis commission on the car that has been silf for 2,38,000.

*asked on December 3, 2016* -
## Math

Kareena got 60% marks in English, 75% in hindi and 130 in maths. The max marks in each of subject are 150,200and 150. Find her aggregate marks.

*asked on December 3, 2016* -
## math

A person that is 1.6 m tall casts a 4 m shadow. At the same time, a nearby tree casts a 12 m shadow. What is the height of the tree to the nearest tenth of a metre?

*asked on November 4, 2016* -
## Science

water is flowing through a horizontal pipe of varying cross section at any two places the diameters of the tube are 4cm and 2cm if the pressure difference between these two places be equal to 4.5cm then determine the rate of flow of water in the tube

*asked on September 10, 2016* -
## financial management

Barclays bank has agreed to give Dumisani a loan of $250 000 on the following conditions: a) 16% interest rate compounded monthly b) Dumisani will have to pay back 12 equal installments each at the end of each quarter. Determine the value of each

*asked on May 18, 2016* -
## Msth

4(y+1)+3(y-6)+14=-28

*asked on May 9, 2016* -
## Math

2(3c to the 2nd power+ c +-2 Please check 6c to the 4th power+c squared + -4

*asked on May 8, 2016* -
## Math

Please check Simplify 7t+3+t+9=8t+12 Simplify m-2-4m-5=-3m+7 Solve 90=5t+t 90=6t t=15

*asked on May 8, 2016* -
## HISTORY

Greek educators, religious reformers,scientist of intellectual revolution, political philosophers constructed the door through when the pilgrims entered the new world when they arrived. [Critically analyze] who are the Greek educators? who are the

*asked on March 7, 2016* -
## statistics (math)

of college students 45% are women 8% have a GED. suppose a student is selected at random. Given that the selected employees is a woman. what is the probability that she has a GED

*asked on November 28, 2015* -
## Statistic math

student is graduating from their university and has applied to jobs at company A and B. The student thinks they have a 40 % chance of a receiving an offer from company A and a 50 % chance of receiving an offer from company B. If the student receives an

*asked on November 28, 2015* -
## Algebra 2

The lenths of the side of a triangle are x+4 units, x units, and x+1 units. Express the perimeter of the triangle as a polynomial in standard form.

*asked on November 12, 2015* -
## chemistry

name three characteristics of nonmetals

*asked on November 7, 2015* -
## math

charlene takes the bus to work in the morning, then walks home for lunch, walks back to work, and finally walks home in the evening. The distance one way is 600 meters. How far does she walk each day between home and work? 1.2 kilometers 1.8 kilometers 180

*asked on November 7, 2015* -
## math

how do you convert miles to feet in the u.s. customary sysyem? multiply by 12 divide by 12 multiply by 5,280 divide by 5,280

*asked on November 7, 2015* -
## Math

Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?

*asked on October 8, 2015* -
## Math

Shana has written a 3 digit number in which the digits are all different. The sum of the digit of her number is 14. And the product of her number is 54. The digits are in order from greatest to least. What are her numbers?

*asked on October 8, 2015* -
## math problems

shelia works at Bills Bargin. She earns $350 per week plus 10% of all sales. What is her commission for the week, if she sold $2490 worth of goods?

*asked on August 2, 2015* -
## chemistry

The edge length of face centered unit cubic cell is 508pm.if the radius of the cation is 110 pm,the radius of anion is

*asked on July 7, 2015* -
## MATH

0.4771=x/2.303*8.14[50/323*373 calc.-x?

*asked on May 28, 2015* -
## maths

0.4771=x/2.303*8.14[50/323*373 calc.-x?

*asked on May 28, 2015* -
## PHYSICS

An object of mass M is divided into two parts ,which are placed at distance d.if gravitational force of attraction is maximum between parts,then find the ratio of mass of both parts

*asked on April 3, 2015*