# William

Popular questions and responses by William-
## Geometry

In trapezoid $ABCD$, $\overline{AB}$ is parallel to $\overline{CD}$, $AB = 7$ units, and $CD = 10$ units. Segment $EF$ is drawn parallel to $\overline{AB}$ with $E$ lying on $\overline{AD}$ and $F$ lying on $\overline{BC}$. If $BF:FC = 3:4$, what is $EF$?

*asked on May 6, 2017* -
## Grammar Advisor

Are these correct? I mark my answer with an X. 88. The reason to list all of the preliminary (non-procedural) information in a lesson plan is to be sure have considered each aspect. keep good records for your future needs. be able to communicate clearly

*asked on September 25, 2013* -
## chemistry

What volume of 0.307 m naoh must be added to 200.0ml of 0.425m acetic acid (ka = 1.75 x 10-5 ) to produce a buffer of ph = 4.250?

*asked on July 18, 2018* -
## Trig application

I can't figure this out. A famous golfer tees off on a long, straight 459 yard par 4 and slices his drive 10 degrees to the right of the line from tee to the hole. If the drive went 288 yards, how many yards will the golfer's second shot have to be to

*asked on October 29, 2015* -
## English

In Academy writing, introductions must include a thesis statement. true or false

*asked on July 14, 2020* -
## Grammar Advisor

I just cannot figure out if these answers are correct or not. Can you please help me? 78. If the sound system hadn’t failed, last night’s show would have been better. This is a correct sentence using the 1st conditional form. x This is a correct

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

Gold is alloyed with other metals to increase its hardness in making jewelry. Consider a piece of gold jewelry that weighs 9.85 g and has a colume of 0.675 cm cubed. The jewelry contains only gold and silver, which have densities of 19.3 g/cm cubed and

*asked on July 25, 2005* -
## math

if a polynomial leaves a remainder of 5 when divided by x-3 and a reminder of -7 when divided by x+1, what is the reminder when the polynomial is divided by x^2-2x-3?

*asked on March 21, 2019* -
## biology

There are two methods used for cutting DNA into small pieces – this is via ultrasound and restriction enzymes. Which method is considered better and why?

*asked on May 21, 2008* -
## Algebra 1

Write M={1,3,5,7,9,11,13,15,17,19} in set builder notation

*asked on December 24, 2019* -
## Finance

Winnebagel Corp. currently sells 33,000 motor homes per year at $49,500 each, and 13,200 luxury motor coaches per year at $93,500 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 23,100 of these

*asked on February 4, 2012* -
## chemistry

What is the %v/v concentration of a solution made by adding 25 ml of acetone to 75 ml of water?

*asked on July 22, 2018* -
## Ap Chemistry

Can anyone help me with this question How much NaCl should be added to 0.35 L of a 0.15 M solution of AgNO3 so that it reacts completely with the silver to form AgCl(s)? A. 8.8 g B. 0.0525 g C. 0.89 mg D. 3.07 g

*asked on April 12, 2018* -
## Psychology

Agatha maintains that people are capable of freely making voluntary choices. Constance is mainly focused on how aggression is caused by genetic inheritance. It seems reasonable to assume that Constance is not much interested in environmental factors

*asked on May 29, 2019* -
## geometry

In triangle $ABC$, $BC = 4$, $AC = 3 \sqrt{2}$, and $\angle C = 45^\circ$. Altitudes $AD$, $BE$, and $CF$ intersect at the orthocenter $H$. Find $AH:HD$. I tried using the pythagorean theorem to find side lengths, algebraically, but I couldn't find

*asked on June 23, 2017* -
## Physics

A flea can jump a vertical height h. What is the maximum horizontal distance it can jump? What is the time in the air in both cases?

*asked on November 15, 2017* -
## Art

1. Why would an artist chose to use harmony in a piece of artwork? 2. Perspective drawings will utilize all methods listed here except? 3. To create an image that is not harmonious, an artist could...?

*asked on November 3, 2014* -
## Math

Work out the product of 1 3/5 and 8 1/2 Give your answer in its simplest form as a mixed number.

*asked on April 15, 2020* -
## geometry

Isosceles $\triangle{ABC}$ has a right angle at $C$. Point $P$ is inside $\triangle{ABC}$, such that $PA=11$, $PB=7$, and $PC=6$. Legs $\overline{AC}$ and $\overline{BC}$ have length $s=\sqrt{a+b\sqrt{2}}$, where $a$ and $b$ are positive integers. What is

*asked on May 28, 2017* -
## English

@ words : 1- curtail 2- devastate 3- digress 4- incentive 5- incorporate 6- indispensable 7- intermittent 8- rigor 9- squander 10-succumb Linda never had to work hard to make good grades in high school. But in college, where the ___(8)___ of course work

*asked on October 23, 2014* -
## Chemistry

A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. What element should you look at first in balancing this equation? A. oxygen

*asked on November 7, 2009* -
## math

The surface area covered by a rectangular playground is 100 square yards. The width of the playground is 15 yards longer than its length. Using factors, find the length and the width of the playground.

*asked on November 28, 2016* -
## Physical Science

An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? What force is needed to stretch the spring 30 cm?

*asked on December 19, 2012* -
## physics

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.30 kg·m2 about its central axis, is set spinning

*asked on April 18, 2010* -
## chemistry

The amount of copper was determined in 10 g sample. copper was precipitated, filtered and calcined, obtaining a final precipitate of 0.79 g oxide of copper , What % in copper mass in this sample?

*asked on June 24, 2020* -
## Algebra

The legs of an isosceles triangle are 0.3 foot less than twice the base. The perimeter of the triangle is 4.9 feet. What is the length of one of the triangle’s legs?

*asked on May 1, 2015* -
## English

How is the word brusque used in a complex sentence? please give examples.

*asked on October 28, 2014* -
## calculus

The circumference of a sphere was measured to be 74 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.) cm2 What is the relative error? (Round

*asked on March 18, 2012* -
## Physics

Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 3.5 1011 kg (and a radius of only 1.0 10-14 m) reached Earth, at what distance from your head would its gravitational

*asked on February 19, 2011* -
## chemistry

What is the pH of sodium hydroxide (NaOH) 0.5N

*asked on June 26, 2018* -
## Calculus

For Questions 1–2, use the differential equation given by dy/dx = xy/3, y > 0. 1. Complete the table of values x -1 -1 -1 0 0 0 1 1 1 y 1 2 3 1 2 3 1 2 3 dy/dx 2. Find the particular solution y = f(x) to the given differential equation with the initial

*asked on May 7, 2018* -
## Chemistry

Calculate the heat of reaction (ΔHrxn) for the following reaction: 5O2(g) + 4NH3(g) → 6H2O(g) + 4NO(g)

*asked on April 13, 2018* -
## chemistry

Which is the mass of the solute in 400 grams of 20% solution. What is the concentration of this solution knowing that its density is 1.2 g/mL

*asked on September 21, 2017* -
## Vectors, Math

A is (3, 2) and point B is 4 units from A in the direction (1,-1) Find AB(arrow). Find the coordinates of B. I can't do this question, Ive attempted it many times.

*asked on April 11, 2016* -
## Chemistry

A sample of calcario and other components of the soil was intensely warm. Under these conditions, the calcario undergoes decomposition in calcium oxide and carbon dioxide. CaCO3 (s)-> CaO (s) + CO2 (g) The analysis of 71, 42 g of a sample of limestone

*asked on March 28, 2016* -
## physics

3 equal charges each of of 2*0.000001C are fixed at three corners of an equilateral triangle ofsides 5 cm.find the column force experienced by one of the charge due to the other two

*asked on March 23, 2016* -
## History Help?

What role did Stephen Austin play in the settlement of Texas by American colonists? He defeated Santa Anna's army, making it safe for colonists in the region. He convinced American colonists in Texas to declare their independence from Mexico. He received a

*asked on December 1, 2014* -
## Psychology

Sources of stress do not automatically cause stress-related problems. Moderators of stress, which can include our personal strengths, might mean that we can have a healthier and more productive life in spite of life's challenges, or maybe even because of

*asked on October 28, 2012* -
## physics

A piece of metal at 80 degrees celsius is placed in 1.2 L of water at 72 degrees celsius. The system is thermally isolated and reaches a final temperature of 75 degrees celsius. Estimate the approximate change in entrophy for this process.

*asked on April 19, 2012* -
## chemistry

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

*asked on December 6, 2010* -
## calc2

A manufacturer sells two products, one at a price of $3000 a unit and the other at a price of $12000 a unit. A quantity q1 of the first product and q2 of the second product are sold at a total cost of $5000 to the manufacturer. Express the manufacturer's

*asked on December 1, 2010* -
## chemistry

How do you calculate the energy released when 1 mole of ethanol, C2H5OH, is burned?

*asked on November 7, 2010* -
## Science

How much would a 75 kg man weigh due to the effect of gravity?

*asked on November 4, 2010* -
## chemistry

What is the volume of solution in which 7.6 g of FeSO4 should be dissolved in order to obtain a solution is 0.1 N?

*asked on June 6, 2020* -
## Maths

Two people depart from the same spot.One traveling North at at 5 ft per second and one traveling East at 1 ft per second.How fast are they separating from each other after 5 seconds?

*asked on April 14, 2020* -
## Counseling

What courses can I do with the subject like Geography, Life Sciences, Agricultural Sciences and Mathematical Litaracy?

*asked on February 1, 2020* -
## math

a plant grew 18 inches over 5 months. the plant grows the same amount each month. use this rate to complete the tabel

*asked on November 21, 2019* -
## science

An electric train moving at 20kgh-1 accelerate to a speed of 30kgh-1 in 20s.find the distance travel in meters during the period of acceleration.

*asked on September 19, 2019* -
## Chemistry

What mass of H2 gas would be formed when 2.45 g Zn reacts with excess acetic acid? Zn (s) + 2 HC2H3O2 (aq) ------> H2 (g) + Zn (C2H3O2)2(aq)

*asked on September 13, 2019* -
## Lo

Suggest how attitude and safety skills may deal with the impact of environmental factors at a personal level.

*asked on August 10, 2019* -
## life orientation

define risky behaviours

*asked on August 3, 2019* -
## english

who should I choose on call of the wild

*asked on July 24, 2019* -
## Math

A, B, C and D are four points on a line such that AB:AC = 7:10, and BD:CD = 9:2. If CD = 9 cm, what is the length, in cm, of AB? A) 49 B) 64 C) 54.25 D)73.25 E)70

*asked on October 2, 2018* -
## chemistry

Calculate the volume of hydrogen gas from the C4H9O3N compound, under temperature or pressure conditions (STP).

*asked on July 30, 2018* -
## chemistry

Indicate what type of compound (ionic or covalent) would be expected from the possible binary combinations of the following elements: O, F, Cs, CI, Na. Consider the elements ' negativity

*asked on July 30, 2018* -
## chemistry

The melting temperatures of the two isomers of molecular formula C2H6O are-139 °c and-115 °c. Knowing that one of the isomers is an alcohol and the other a ether, indicate the melting temperature corresponding to each of them

*asked on July 13, 2018* -
## chemistry

A calorimeter is filled with 250.0 g of water at 24.6oC. A 60.0 g sample of a metal at 100.0 oC is dropped in this calorimeter and causes the temperature to increase a total of 4.5oC. What is the specific heat of the metal (in J/g°C)? Ignore the

*asked on July 1, 2018* -
## chemistry

What volume of 15.00 M CaCl2 solutions is needed to make 3.000 gallons of 5.500 M CaCl2 solution ?

*asked on July 1, 2018* -
## Calculus

The table below gives selected values for the function f(x). Use a trapezoidal estimation, with 6 trapezoids to approximate the value of 2∫1 f(x) dx . x 1 1.1 1.3 1.6 1.7 1.8 2.0 f(x) 1 3 5 8 10 11 14

*asked on June 28, 2018* -
## chemistry

25 ml of milk were titrated with a 0.124M KOH solution of potassium hydroxide. If 4.5 ml of KOH solution were required to reach the titration endpoint, with a percentage (% w / v) lactic acid present in the milk? (MM = 90.08g / mol)

*asked on June 16, 2018* -
## Algebra 1

A salesman starts a trip with 15 gallons of gasoline in his tank. After traveling 220 miles he has 10 gallons of gasoline in his tank. Model this relationship with a linear equation relating the number of miles you can travel to the remaining gallons of

*asked on July 18, 2017* -
## software development

statement that assigns the length of an array named intMovieTimes to intSpan. intPan = (intMovies.intSpan).

*asked on July 11, 2017* -
## Trig/PreCalc

Find a parametrization for the line segment with endpoints (5,2) and (-2, -4).

*asked on January 10, 2017* -
## Physics

A space station, in the form of a wheel 197 m in diameter, rotates to provide an “artificial gravity” of 2.5 m/s2 for persons who walk around on the inner wall of the outer rim. The rate of the wheel’s rotation in revolutions per minute that will

*asked on December 8, 2016* -
## Physics

A 5.7 g bullet leaves the muzzle of a riﬂe with a speed of 636.8 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the riﬂe? Answer in units of N

*asked on October 13, 2016* -
## geometry

The endpoints of are A(2, 2) and B(3, 8). is dilated by a scale factor of 3.5 with the origin as the center of dilation to give image . What are the slope (m) and length of ? Use the distance formula to help you decide: .

*asked on September 11, 2015* -
## Algebra

The measure of the smallest angle of a triangle is one-fourth the measure of the largest angle. The measure of the second angle is 36 less than the measure of the largest angle.

*asked on August 31, 2015* -
## math

Kendra bought 4 paintings and wants to hang them side by side on a wall in her bedroom. However, only 3 of the paintings will fit side by side on this wall. How many different ways can Kendra arrange 3 of the 4 paintings on the wall?

*asked on July 31, 2014* -
## math

Sheila received a 6.5% commission on a house she sold for $110,400. How much commission did she receive?

*asked on August 14, 2013* -
## Science

Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is

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

I am moving to a new house. My old house is 3 kilometers from my new house. How many meters is the old house from the new house?

*asked on October 30, 2012* -
## vocabulary

The ----------- definition of gloomy is dismal or depressing.

*asked on June 18, 2012* -
## Physics

At a city park, a person throws some bread into a duck pond. Two 4.00-kg ducks and a 9.00-kg goose paddle rapidly toward the bread, as shown in our sketch (Intro 1 figure) . If the ducks swim at 1.10 m/s, and the goose swims with a speed of 1.30 m/s, the

*asked on March 25, 2012* -
## chemistry

The combustion of 0.1619 g benzoic acid increases the temperature of a bomb calorimeter by 2.77°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) kJ/°C A 0.1510 g sample of vanillin

*asked on November 13, 2011* -
## chemistry

Consider the dissolution of CaCl2. CaCl2(s) Ca2+(aq) + 2 Cl-(aq) ΔH = -81.5 kJ A 13.0 g sample of CaCl2 is dissolved in 134 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the

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

find the product or quotient. write the strategy you used, write model, break apart, multiplication table, inverse operations, pattern, or doubles

*asked on September 25, 2011* -
## Chemistry

100 grams of glucose is mixed with 500 grams of water. 10 grams of yeast is then added to the mixture. If the reaction goes to completion, what is the mass of ethanol in the final mixture?

*asked on April 28, 2011* -
## Math - Calculus

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2].

*asked on February 28, 2011* -
## Physics Craziness

A big olive (m = 0.40 kg) lies at the origin of an xy coordinate system, and a big Brazil nut (M = 1.2 kg) lies at the point (1.0,2.0) m. At t = 0, a force o = (2.0 + 3.0) N begins to act on the olive, and a force n = (-3.0 - 2.0) N begins to act on the

*asked on February 28, 2011* -
## help me physics

The femur is a bone in the leg whose minium cross-sectional area is about 3.60 E-4 m2. A compressional force in excess of 6.90 E4 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. 1 N/m2 (b) What is the strain that exists

*asked on November 16, 2010* -
## Accounting please help in homework

The overall (weighted average) cost of capital is composed of a weighted average of : a)The cost of common equity and the cost of debt b)The cost of common equity and the cost of preferred stock c)The cost of preferred stock and the cost of debt d)The cost

*asked on August 5, 2010* -
## Triginometrry

Solve an equation 8x^3+4x^2-18x-9=0 algebraically for all values of x.

*asked on January 1, 2010* -
## math

What is the value of the underline digit 6 in 4,600,028

*asked on August 31, 2011* -
## chemistry

Is there a salt bridge in a fuel cell? I think there isn't one because hydroxide ions and hydrogen ions are in the water, so they can move around freely already.

*asked on February 21, 2008* -
## chemistry

a technician went to the laboratory to prepare a solution of 250.0 mL of calcium carbonate (Na2CO3). It was weighed on the analytical balance 1.3316g of the solid calcium carbonate reagent. Knowing that salt has 99.5 %m/m, calculate the %m/v of this

*asked on June 28, 2020* -
## Physics

Principle of moments.

*asked on May 2, 2020* -
## Physics

State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.

*asked on May 2, 2020* -
## creative writing

the clover told me he was good luck

*asked on April 30, 2020* -
## Pre-calculus

An airplane’s velocity with respect to the air is 569 miles per hour, and it is heading N 63 ◦ W. The wind, at the altitude of the plane, is from the southwest and has a velocity of 77 miles per hour. Draw a picture that gives a visual representation

*asked on April 8, 2020* -
## math (algebra)

If x = 6 and y = −2, find the value of (a) x² (b) 5x + y (c) x + y²

*asked on March 26, 2020* -
## science

0,0,3,4,5,7,8,9,36

*asked on April 24, 2019* -
## Engilsh

An Essasy A Short Incident I Witness

*asked on October 13, 2018* -
## Physics

A car travels for .50 of a trip at 20 km/h. How fast must it travel in the second half to average 55 kmh?

*asked on September 20, 2018* -
## math

What is the answer to to 85,639 with the underlined being 3 answer ? I got 85,640 is this correct

*asked on September 10, 2018* -
## chemistry

What is the g/L concentration of a solution terminating 10g of NaCI with 95% purity in 250 ml of water?

*asked on July 12, 2018* -
## chemistry

Knowing that the Atom X mass is equivalent to 6 boron 10 atoms, what is the relationship between the masses of atom X and the carbon atom 12?

*asked on June 28, 2018* -
## chemistry

5.750 ml of a soil sample was dissolved in water up to the volume of 50 ml. An aliquot of 10 ml of the same was transferred to an Erlenmeyer flask and added 10 ml of KOH 1 mol L-1 and 2. Drops of Calcein and the solution that had a yellow coloration was

*asked on June 24, 2018* -
## chemistry

An analyst wants to determine the content of a 7% magnesium hydroxide bottle acquired in a drugstore, through the Volumetry method of neutralization. 8.995 g of magnesium hydroxide suspension were avolumados to 100ml of water, then,25 ml were added to the

*asked on June 14, 2018* -
## chemistry

We can determine the content (%) of calcium in milk through complexometric analysis by titration with EDTA. If we weigh 0.50 g of milk powder and titrate with EDTA 0.010 mol/L. What percentage of Ca2+does the milk if expended EDTA was 13.6 ml?

*asked on June 13, 2018* -
## chemistry

A 100ml aliquot of a water sample containing Ca(II) and Mg(II) is titrated with 22,74mL of EDTA 0.00998 mol/L at PH 10. Another aliquot of 100ml of the same sample is treated with NaOH to precipitate Mg(OH)2 and is then titrated with PH 13 with 15.86 ML of

*asked on September 27, 2017*