# Allie

Popular questions and responses by Allie-
## math

The cost of making a shirt is half of what the shirt normally sells for. Today, however, the shirt is on a 15% discount from its normal price. What is the current price of the shirt?

*asked on October 4, 2017* -
## math

A student has passed 60 percent of the 20 quizzes he has written so far successfully. If the student writes 50 quizzes during the year, and passes 80 percent of the remaining quizzes successfully, what would his average percentile be? same with this one

*asked on November 11, 2016* -
## Physics

(a) Calculate the absolute pressure at the bottom of a fresh-water lake at a depth of 23.2 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa. Pa (b) What force is exerted by the water on the window of an

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

The ratio of the number of Mimi’s Eminem cd’s to the number of Rita’s Eminem cd’s is 5:8. Rita has 18 more Eminem cd’s than Mimi. If Rita gives 22cd’s to Mimi, what will be the new ratio of the number of Mimi’s Eminem cd’s to Rita’s? i am

*asked on November 11, 2016* -
## Accounting

In its first month of operations, Giffin Company made three purchases of merchandise in the following sequence: (1) 260 units at $5, (2) 360 units at $7, and (3) 460 units at $8. Assuming there are 160 units on hand at the end of the period, compute the

*asked on October 12, 2015* -
## Chemistry

An acetic acid buffer solution is required to have a pH of 5.27. You have a solution that contains 0.01 mol of acetic acid. How many moles of sodium acetate will you need to add to the solution? The pKa of acetic acid is 4.74. Show all calculations in your

*asked on July 27, 2017* -
## geometry

Given: ∆AKL, AK = 9 m∠K = 90o m∠A = 60 ° Find: The perimeter of ∆AKL The area of ∆AKL for this one i got 81 for the perimeter side a 6 and side b is 12

*asked on February 17, 2017* -
## Maths

Given sec θ =(square root) 10 and tan θ = 3, determine the following, csc(90° − θ)

*asked on July 9, 2016* -
## math

If 8a−4b=20 and 4a−8b=4, then what is the value of a−b? i got 2

*asked on June 9, 2017* -
## Geometry

Given: ABCD is a trapezoid, AB = CD, BK âŠ¥ AD (they are perpendicular , AK = 10, KD = 20 Find: BC AD I got that BC is 15 and AD is 35 so I got BC/AD=15/35 is this answer right? and is so can you add the answer and an explanation

*asked on April 29, 2017* -
## geometry

In ΔABC, m∠ACB = 90°, and m∠ACD = 45°. Find:AC, if CD =6√2 in. can u put answer and solution

*asked on February 17, 2017* -
## Is it possible if you guys can check my algebra HW

two bags had 100 kilograms of sugar each. After taking out 3 times as much sugar from bag one than bag two , bag one had half as much sugar was bag two.How much sugar is left in each bag? i got 9 kilogram in bag on 1 and 0 grams in bag 2

*asked on September 30, 2016* -
## math

A rhombus has sides 10 cm long and an angle of 60 degrees. Find the distance between a pair of opposite sides. can u plz post the answer down with explanation. thanx, :)

*asked on April 20, 2017* -
## Statistics

Scores on an SAT test have a mean of μ = 1026 and a standard deviation of σ = 209. Compute the margin of error of the sample mean for a random sample of 100 students.

*asked on October 9, 2016* -
## geometry

The lengths of the bases of the right trapezoid are 9 cm and 18 cm. The length of a longer leg is 15 cm. Find the area of the trapezoid.

*asked on May 3, 2017* -
## Physics

Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2430 kJ/kg at body temperature, and the body can produce as much as 1.3 kg of sweat per hour. If sweating were the only heat dissipation

*asked on December 2, 2011* -
## physics

A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.5 m/s as in the figure below. If his speed is 27.1 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.

*asked on March 9, 2011* -
## Honors Physical Science

A force of 12 N is applied to the handle of a screwdriver being used to pry off the lid of a paint can. As the force moves through a distance 0.3 m, the screwdriver does 3.2 J of work on the lid. What is the efficiency of the screwdriver? Show your work.

*asked on March 6, 2020* -
## algebra

Find the coordinates of the points of intersection of the graph of y=13−x with the axes and compute the area of the right triangle formed by this line and coordinate axes. can u guys plz find answer + explain this problem is really hard and confusing 2

*asked on October 12, 2016* -
## Physics

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0037 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.7 102 ft/s,

*asked on October 4, 2011* -
## math

Given: ΔKLM, KL = LM = 13in, KM = 10in. Find: The area of ΔKLM I got for the area 12√34 but its wrong :(

*asked on February 25, 2017* -
## OK History

I need someone to make sure my answers for my Oklahoma State History homework are correct. I put *** by my answers. If I am wrong, please explain why or help me find the right answer. Thanks in advance! 1. Indian Territory after the Civil War experienced

*asked on March 26, 2017* -
## math

It takes 18 electricians 35 days to wire a new housing subdivision. How many days would 28 electricians require to do the same job?

*asked on October 28, 2016* -
## math

State whether the lines are parallel, perpendicular, or neither. Show your work.x–5y=103 and –2x=–206–10y i got neither is that right

*asked on October 21, 2016* -
## Math

R varies jointly as S and the square of T. If R is 32.4 when S=0.2 and T=9, find R when S=0.5 and T=5. I believe the answer is R=25, could someone check this for me?

*asked on March 15, 2012* -
## ochem

list from strongest acid to weakest acid HC(triple bond)CCH3 H2C=CH2 H3CNH2 CH4 H2O i thought the order went HC(triple)CCH3 H3CNH2 H2O H2C=CH2 CH4 but it comes out as wrong and i don't know why >

*asked on February 14, 2011* -
## ocher

Estimate how many theoretical plates are needed to separate a mixture that has a mole fraction of B equal to 0.70 (70% B) in Figure 15.3.

*asked on March 14, 2017* -
## Algebra

The data below represents the average score per game of the top 40 NBA players, rounded to the nearest whole number. Find the minimum, Q1, median, Q3, maximum for the data. Stem l leaf 1 l 55667777888888899 2 l 00000011123445566679 3 l 135

*asked on May 2, 2013* -
## Math

An invoice of $12,000 is dated April 5. The terms 5/10,n/30 are offered. Find the amount due if the discount is earned. Show your work.

*asked on October 12, 2012* -
## Physics

Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 75 steps per minute, with each step 8.00 inches high. If you weigh 150 lb and the machine reports that 690 kcal have been burned at the end of the workout, what efficiency is

*asked on December 2, 2011* -
## Physics

An ideal monatomic gas expands isothermally from 0.590 m3 to 1.25 m3 at a constant temperature of 670 K. If the initial pressure is 8.00 104 Pa. (a) Find the work done on the gas. Answer is in J (b) Find the thermal energy transfer Q. Answer is in J

*asked on December 2, 2011* -
## Physics

A satellite has a mass of 99 kg and is located at 1.97 106 m above the surface of Earth. (a) What is the potential energy associated with the satellite at this location? Answer in J (b) What is the magnitude of the gravitational force on the satellite?

*asked on October 6, 2011* -
## physics

A child and sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled starts from rest and has a speed of 3.40 m/s at the bottom, what is the height of the hill?

*asked on March 9, 2011* -
## math

3(x+5)=7x−6 Give your answer as an improper fraction in its simplest form

*asked on May 19, 2019* -
## Statistics

there is good evidence that moderate alcohol use improves health. some people think that red wine is better for your health than other alcoholic drinks. you have recruited 300 adults aged 45-65 who are willing to follow your orders about alcohol

*asked on November 7, 2017* -
## math

Justin is 3 years older then Sam, and Justin’s age in 2 years will be twice what Sam’s age was 3 years ago. Find their present ages. i got 14 and 17 but the answer is wrong

*asked on February 19, 2017* -
## Calculus

Suppose that you are to make a rectangular box with a square base from two different materials. The material for the top and four sides of the box costs $1/ft2$1/ft2; the material for the base costs $2/ft2$2/ft2. Find the dimensions of the box of greatest

*asked on November 19, 2016* -
## English

"The Yellow Wallpaper" by Charlotte Perkins Gilman Can someone check to see if these are right? Much appreciated. I tried to include the quotes to make it a little easier. 1. The narrator's attitude towards the setting in lines 1-5 is best described as ? "

*asked on October 27, 2016* -
## AP Chemistry

Hey guys! Stuck on another one: The reaction 2N2O(g) 2N2(g) + O2(g) has Kc = 3.5 × 10-18 at a particular temperature. If 0.20 mol of N2O is placed in a 1.00 liter container, what will be the N2 concentration when equilibrium is reached? 1. 4.4 × 10-9

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

A sprinter in a race can run 100m in 11.4 seconds. If it takes him 4.2 seconds to accelerate to top speed, what is the magnitude of his acceleration? Assume that he stays at his top speed from 4.2 seconds till the end. I do not understand which kinematics

*asked on February 15, 2015* -
## math

how do I translate this sentence into an equation. 51 is the product of Malik's height and 3 . Use the variable m to represent Malik's height

*asked on February 13, 2015* -
## physics

What potential difference is needed to stop an electron having an initial speed of 3.70x 105 m/s? Answer in volts

*asked on January 29, 2015* -
## World History

For my research project, I need to choose an absolute monarch. I want to do one on a monarch/emperor/king from Vietnam because I have Vietnamese origins and am interested in learning more about its history. Is there any well known Vietnamese absolute

*asked on November 19, 2013* -
## physics

the moon has a period of 27.3 days and a mean distance of 3.90x10^8 m from the center of the earth. find the period of a satellite in orbit 6.7x10^6 m from the center of earth. thank you!

*asked on October 26, 2013* -
## Biology

can anyone tell me a little about MacArthur and Wilson's theory of island biogeography? I need to answer the question Describe a series of small habitats that exist within 10 to 20 kilometers of your house and which might be subject to MacArthur and

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

Clap your hands and estimate the energy and power released as sound waves. I know Kinetic energy= 1/2*m*v^2 and Power is KE/t but how do I find the velocity of the sound wave made from clapping my hands? and for the mass do I use the mass of my hands?

*asked on August 13, 2011* -
## math

Use the rational zero theorem, Descartes rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the following equation: 4x^(3)-17x^(2)+16=0

*asked on October 25, 2010* -
## chemistry

how much heat dows a 23.0g ice cube absorb as its temp increases from -17.4deg C to 0.0deg C?

*asked on April 29, 2010* -
## PreCalc

Triangle ABC is given where m(angle)A=33 degrees, a=15 in., and the height, h, is 9 in. How many distinct triangles can be made with the given measurements? Explain your answer.

*asked on March 18, 2020* -
## Hardy Weinberg: Biology

Can someone explain how to answer these questions given the different variables given? I have a test soon. Dr. Martin Brenner and his team have built a space ship which can travel at the speed of light (186,000 miles per second) and travel to parallel

*asked on November 14, 2017* -
## Math

Mr.Rivas bought a can of paint.He used 3/8 of it to paint a bookshelf. He used 1/4 of it to paint a wagon. He used some of it to paint a birdhouse and has 1/8 of paint left. How much did he use for the birdhouse

*asked on January 17, 2017* -
## math

Two trucks are traveling in the same direction, one going twice as fast as the other. At the end of 6 hours they are 204 miles apart. How fast is each travelling? Can you guys show me the answer i got 68 and 146 but its wrong

*asked on January 5, 2017* -
## Physics

You exert a force of 200 N at an angle of 15 degrees above horizontal to pull a 10 kg box across the floor at constant velocity. If the coefficient of kinetic friction between the box and the floor is 0.42, what is the acceleration of the box?

*asked on December 8, 2016* -
## algebra 2

Write a quadratic equation with roots 2 - 3i and 2 + 3i. I just need confirmation I did it correctly. I got y = x^2-4x+13

*asked on November 17, 2016* -
## Maths

If sinθ = (square root) 3/2 , find the value of θ in degrees (0 < θ < 90°)

*asked on July 9, 2016* -
## enlish part 1

A Lincoln Preface is an example of what kind of writing?

*asked on May 4, 2016* -
## AP Chemistry

I'm so sorry to bother you guys again! Stuck on two other questions: 1. In the following equilibrium: NaCl(s) Na+(aq) + Cl–(aq), would adding more NaCl(s) increase the Cl-(aq) concentration? Explain why. My thoughts: I thought that it wouldn't increased

*asked on October 22, 2015* -
## AP Chem

Hey guys! Stuck on some pH problems! Thanks so much in advanced: A) Calculate the pH of a 0.200 M solution of potassium acetate, KCH3CO2, in water at 25 °C. At this temperature, Ka = 1.76 × 10-5 for acetic acid. 1. 2.73 2. 5.45 3. 9.02 4. 9.94 5. 10.16

*asked on October 10, 2015* -
## AP Chemistry

Hey guys stuck again! Bromine and chlorine dissolve in carbon tetrachloride and react to form BrCl: Br2 + Cl2--> 2BrCl (in CCl4) Under equilibrium conditions [Br2] = [Cl2] = 0.00430 M and [BrCl] = 0.0114 M. The addition of 0.100 moles of Br2 to exactly one

*asked on October 9, 2015* -
## AP Chemistry

Hey guys! I'm stuck on some study guide problems... (On the bottom of this, I put what answers make sense to me) A) A factor that affects the speed of heterogeneous reactions but not of homogeneous reactions is 1)nature of reactants 2)concentration of

*asked on September 23, 2015* -
## chemistry

Write out the mechanism (using correct curved arrow notation) for the acid-catalyzed, cis-trans isomerization of maleic acid (into fumaric acid) If the electrophilic addition reaction of maleic acid with HCl had gone to completion what would be the

*asked on December 3, 2014* -
## science

I need an acrostic poem for the element Sodium?? puhleez?! THANX!!!

*asked on December 7, 2013* -
## CHEMISTRY

Given that Mg(ClO3)2 decomposes into magnesium chloride and oxygen: A) Write a balanced equation for this reaction. I got Mg(ClO3)2 yields MgCl2 + 3 O2 Is that right? B) If 0.302 grams of O2 is lost from 1.890 grams of a mixture of Mg(ClO3)2 and an inert

*asked on September 30, 2013* -
## Trig

Verify the identity. (secx + tanx)/(secx - tanx) = (1 + 2sinx + sin(^2)x)/cos(^2)x

*asked on May 9, 2013* -
## Algebra

The stem-and-leaf plot represents the average monthly high temperatures in Tampa, Florida. What is the first quartile (Q1) of the temperatures? Round to the nearest tenth. Stem leaf 6 9 7 1267 8 14799 9 00

*asked on May 2, 2013* -
## math

Is a package of 8 hot dog buns proportional to a package of 10 hot dog franks?

*asked on October 28, 2012* -
## 9th gradae physical science

teh density of copper is 8.92 g/cm3. If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?

*asked on January 20, 2012* -
## Physics

A sample of blood is placed in a centrifuge of radius 20.0 cm. The mass of a red blood cell is 3.0 10−16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 10−11 N. At how many revolutions per second should the

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

A 2.4 kg object attached to a horizontal string moves with constant speed in a circle of radius R on a frictionless horizontal surface. The kinetic energy of the object is 95 J and the tension in the string is 315 N. Find R.

*asked on October 4, 2011* -
## Physics

The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 22.0 m/s stops uniformly in 1.20 m, how long does the collision last? s (b) What is the magnitude of the average

*asked on October 4, 2011* -
## physics

A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 2.7 m/s? (b) What power must a motor have to perform this task?

*asked on March 20, 2011* -
## Calculus

What's the practical domain and range of this volume function: 4x^3-39x^2+93.5x

*asked on December 15, 2010* -
## Chemistry

The reaction below shows the corrosion process of iron. Calculate E°cell for the corrosion process and state whether you would predict that this is a spontaneous or nonspontaneous process. 2 Fe (s) + O2 (g) + 4 H+ (aq) → 2 Fe2+ (aq) + 2 H2O (l)

*asked on August 8, 2010* -
## AP Chemistry

The question asked... Calculate the solubility of calcium sulfate in grams solute per 100 grams solvent. Assume that the volume occupied by the solute in the solution in negligibly small. I solved and got 4.9 x 10 ^-3 mol/L... how do I put this in grams

*asked on April 21, 2010* -
## Chemistry

About twenty radioisotopes with ultra-long half-lives, from 82 million years (244- Plutonium) to 6 million billion years (50-Vanadium) are found in the earth’s crust, yet no radioisotopes with half-lives less than 70 million years (146- Samarium) are

*asked on November 16, 2009* -
## chemistry

Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each Al atom has a radius of 1.43 angstroms, what is the length of a side of the unit cell?

*asked on October 20, 2009* -
## math

1. The equation, in general form, of the line that passes through the point (3,4) and is perpendicular to the line 5 x + 5 y + 9 = 0 is Ax + By + C = 0, where a=? b=? c=? 2.The equation of the line that goes through the points ( -9 ,-6 ) and ( -6 ,-3 ) can

*asked on August 30, 2009* -
## Reimbursement Methodologies

You're the new director of a hospital health information management department. The chief financial officer has hired you for your expertise in health care reimbursement and needs to know how your department can help with reimburement. List the mot

*asked on May 25, 2009* -
## science

wehat is the difference between RNA and DNA that allows them to be separated?

*asked on April 9, 2008* -
## PreCalc

Solve the equation 2 cos(x)+1=0, 0

*asked on March 18, 2020* -
## PreCalc

Show that sin(x+pi)=-sinx. Show all of your work.

*asked on March 18, 2020* -
## Honors Physical Science

A small dog is trained to jump straight up a distance of 1.1 m. How much kinetic energy does the 7.7-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s^2.) Show your work.

*asked on March 6, 2020* -
## Honors Physical Science

A 410-g cylinder of brass is heated to 95.0°C and placed in a calorimeter containing 335 g of water at 25.0°C. The water is stirred, and its highest temperature is recorded as 32.0°C. From the thermal energy gained by the water, determine the specific

*asked on March 6, 2020* -
## Chemistry

What is the charge on the lowest energy/most stable ions of K, Sc, S and Br?

*asked on December 10, 2019* -
## science

can someone please help me ASAP I am stuck!! In 3–5 sentences, identify and describe the fossil evidence Wegener used to support the theories of continental drift and plate tectonics.

*asked on August 21, 2019* -
## math

6x + 18 = 4x +1

*asked on May 19, 2019* -
## Social Work

Need homework help Identify and briefly describe two (2) theoretical frameworks used for child welfare policies and programs.

*asked on October 21, 2018* -
## Social Work

Need homework help Discuss the way problem definition is connected to policy formulation

*asked on October 21, 2018* -
## Social Work

Need homework help Include a brief description of the four (4) key components of this framework (i.e., problem domain, life course development, policy responses, interventions)

*asked on October 21, 2018* -
## Social Work

Need homework help Discuss the impact of the Tax Cut and Jobs Act (TCJA) on furthering income inequality and the potential impact on anti-poverty programs

*asked on October 21, 2018* -
## Social Work

Need homework help Discuss the impact of income inequality on educational outcomes and policy

*asked on October 21, 2018* -
## Social Work

Need help with this homework question Briefly describe how the Affordable Care Act (ACA) transformed the mental health system for children and youth. Discuss three themes that may improve the accessibility and quality of services for children

*asked on October 21, 2018* -
## Social Work

I need to write an essay on the questions below. I’m having trouble thinking of modern policies that I could write about. Can anybody help give me some ideas and point me in the right direction? The English Poor Laws instituted the principle of "less

*asked on October 10, 2018* -
## Chem

Am I doing this right? Find the concentration of the phosphate ion. 1.00 mL 210 micro molar. DI water added to 25 ml line. 1.00 mL phosphate solution * 1L/1000mL * 210 mol phosphate solution/1L solution * 1.0 *10^-6 mol/ 1 micromol * 1 mol PO4 3- / 1 mol

*asked on March 8, 2018* -
## Physics

Using symmetry arguments, determine the direction of the force on q = +1.00 µC in Figure 17.33, given that qa = qb = +7.00 µC and qc = qd = -7.00 µC. Calculate the magnitude of the force on the charge q, given that the square is 10.0 cm on a side.

*asked on September 7, 2017* -
## Physics

What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 1.00 nC and a = 7.50? (The positive direction is to the right.)

*asked on September 7, 2017* -
## math

What is the value of x^2+y^2? if x+y=10 and x−y=8 i got 52(x=6, y=4) but its wrong

*asked on June 9, 2017* -
## math

If m/n =5, then m^2−25n^2 = i got 0

*asked on June 9, 2017* -
## math

If a+b=6, b+c=−3, and a+c=5, what is the value of a+b+c? i am not sure how to solve this but would you do this to solve it: A+B+B+C+A+A+C=6+-3+5

*asked on June 8, 2017* -
## math

(a−b)/2 =3 and xa − xb = 12, then x = (A) −1 (B) 1 (C) 2 (D) 4 (E) It cannot be determined from the information given. i got c

*asked on June 8, 2017*