# Henry

Most popular questions and responses by Henry-
## Calculus

A particle moves along the x-axis with velocity v(t) = sin(2t), with t measured in seconds and v(t) measured in feet per second. Find the total distance travelled by the particle from t = 0 to t = π seconds. Do I have to take the integral of the equation

*asked on February 21, 2016* -
## Social Studies

How did the Supreme Court decision in Worcester v. Georgia and the Indian Removal Act lead to the removal and resettlement of Native American groups?

*asked on January 24, 2018* -
## Chemistry

Methanol, a major industrial feedstock, is made by several catalyzed reactions, such as CO(g) + 2H2(g) ----> CH3OH (l) One concern about using CH3OH as an auto fuel is its oxidation in air to yield formaldehyde, CH2OH(g) which poses a health hazard.

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

Pumping stations deliver gasoline at the rate modeled by the function D, given by D(t)= 6t/(1+2t) with t measure in hours and and R(t) measured in gallons per hour. How much oil will the pumping stations deliver during the 3-hour period from t = 0 to t =

*asked on February 21, 2016* -
## Calculus

f(x) and g(x) are a differentiable function for all reals and h(x) = g[f(2x)]. The table below gives selected values for f(x), g(x), f '(x), and g '(x). Find the value of h '(1). (4 points) x 1 2 3 4 5 6 f(x) 0 3 2 1 2 0 g(x) 1 3 2 6 5 0 f '(x) 3 2 1 4 0 2

*asked on February 21, 2016* -
## Calculus

The graph of f ′(x) is continuous and decreasing with an x-intercept at x = 0. Which of the following statements is false? (4 points) The graph of f has an inflection point at x = 0. The graph of f has a relative maximum at x = 0. The graph of f is

*asked on February 20, 2016* -
## Maths

Hasim counted his money. he gave 1/3 to his brother. he spent £12 on his sister. What he had left was half what he had at the beginning. how much did he give his brother?

*asked on May 1, 2017* -
## AP Physics - Equilibrium

The Achilles tendon is attached to the rear of the foot as shown in the figure below. When a person elevates himself just barely off the floor on the ball of one foot, estimate the tension Ft in the Achilles tendon (pulling upward) and the (downward) force

*asked on November 13, 2009* -
## Calculus

The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours)

*asked on February 23, 2016* -
## English

Could I get some check on my answers? Read these lines from Macbeth: The west yet glimmers with some streaks of day: Now spurs the lated traveller apace, To gain the timely inn; and near approaches The subject of our watch. Which of the following correctly

*asked on March 6, 2016* -
## Calculus

Which of the following integrals cannot be evaluated using a simple substitution? I think it is A because if you would substitute there would be nothing left in the equation? Is that right? Options ∫√(x-1) ∫1/√(1-x^2) ∫x/√(1-x^2) ∫√(x^2-1)

*asked on January 2, 2016* -
## us history

Roosevelt's New Deal differed from Hoover's administration in that the New Deal was willing to use government power to adjust the contending claims of major interests groups. Asses the validity of this generalization

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

I thought it was C for this Victor Frankenstein recounts the influences that lead to his great experiment: I feel exquisite pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind and changed its bright visions of

*asked on March 6, 2016* -
## AP Physics Halley's Comet

Halley's comet orbits the sun roughly once every 76 years. It comes very close to the surface of the Sun on its closest approach. Estimate the greatest distance of the comet from the sun. Is it still in the Solar System? What planet's orbit is nearest when

*asked on October 2, 2009* -
## Calculus

Compare the rates of growth of f(x) = x + sinx and g(x) = x as x approaches infinity. f(x) grows faster than g(x) as x goes to infinity. g(x) grows faster than f(x) as x goes to infinity. f(x) and g(x) grow at the same rate as x goes to infinity. The rate

*asked on February 20, 2016* -
## English

I hear the mournful wail of millions, whose chains, heavy and grievous yesterday, are to-day rendered more intolerable by the jubilant shouts that reach them. Which definition of rendered is most likely suited for this line? Caused to be a certain nature

*asked on March 11, 2016* -
## Pre-Calculus

A road sign at the top of a mountain indicates that for the next 4 miles the grade is 12%. Find the angle of the grade and the change in elevation for a car descending the mountain.

*asked on February 5, 2009* -
## AP Physics

A girl is whirling a ball on a string around her head in a horizontal plane. She wants to let go at precisely the right time so that the ball will hit the target on the other side of the yard. When should she let go of the string?

*asked on September 24, 2009* -
## Chemistry

A 500.0 mL sample of saturated nickel(II) phosphate solution was analyzed spectrophotometrically and found to contain 1.88 × 10-5 g of nickel. (a) Determine the molarity of the nickel(II) phosphate solution. (b) Calculate the solubility product constant,

*asked on February 19, 2015* -
## Economics help

An elderly man receives free prescription drugs from a veterans' hospital. So what kind of a good is this, like is this a privately owned service or publicly own service?

*asked on December 4, 2014* -
## Physics

If the coefficient of kinetic friction between a 35 kg crate and the floor is 0.30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if μk is zero?

*asked on December 4, 2012* -
## History

How was James I's rule of England similar to peter the great's rule of Russia? Both reduces the size of their empire. Both increased their own power without approval by other government entitles. Both relied heavily on the opinions of their subjects when

*asked on March 27, 2014* -
## Chemistry

The solubility of insoluble substances changes depending on the nature of the solution. Below are two solutions in which Cu(OH)2 is dissolved; in each case, the solubility of Cu(OH)2 in those solutions is not the same as it is in pure water. (a) For each

*asked on February 19, 2015* -
## math

A farmer wishes to fence a rectangular area behind his barn. The barn forms one end of the rectangle and the length of the rectangle is three times the width. How many linear feet of fence must he buy if the perimeter of the rectangle is 320 feet? The

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

What is pH of 0.1M solution of NH4Br, if the pKb of NH3 is 4.74?

*asked on November 9, 2012* -
## Calculus

Which of the following functions grows the fastest as x goes to infinity? 3^x ln(x) e^4x x^10 I put e^4x but I thought that 3^x might have been it too. I know for sure that it is not ln(x) and x^10 because those grow much slower.

*asked on February 20, 2016* -
## chemistry

what are the hydronium-ion and the hydroxide ion concentration of a solution at 25 C that is 0.0050 M strontium hydroxide, Sr(OH)2? a solution of hydrochloric acid is 0.20 M HCl. What is the hydronium-ion at 25 C? What is the hydroxide ion concentration at

*asked on August 6, 2011* -
## Math

An invoice quotes a price of $620, subject to discount of 30%, 15%, and 5% what is the selling price

*asked on May 27, 2012* -
## Calculus

Which of the following functions grows the slowest as x goes to infinity? x^e e^x ex they all grow the same rate. I think it is c because it does not have any exponents.

*asked on February 20, 2016* -
## Physics

A 10.0 kg barrel is lifted by pulling up on a rope. The barrel accelerates at 1.50 m/s2. Find the force of tension on the rope.

*asked on December 21, 2014* -
## physics

A train whistle is heard at 280Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 270 Hz. What is the speed of the train before slowing down? What is the speed of the train after

*asked on January 21, 2015* -
## Physics

A skateboarder travels on a horizontal surface with an initial velocity of 4.4 m/s toward the south and a constant acceleration of 2.0 m/s2 toward the east. Let the x direction be eastward and the y direction be northward, and let the skateboarder be at

*asked on September 28, 2018* -
## AP Physics - Fluids

A 6.0-cm diameter horizontal pipe gradually narrows to 4.0 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 32 kPa and 24 kPa, respectively. What is the volume rate of flow? I know to use Bernoulli's

*asked on November 20, 2009* -
## Geometry

Find AX in the diagram if CX bisects angle ACB. And then there's a diagram below with triangle ABC, where X is on line C, BC=45, AC=21, and BX=30.

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

To forget them, to pass lightly over their wrongs, and to chime in with the popular theme, would be treason most scandalous. . . Which word is most similar to how chime in is used here? Agree Create Harmonize Resound I have no idea because chime in- means

*asked on March 11, 2016* -
## Calculus 2

Sketch the region in the first quadrant enclosed by y=7/x, y=2x, and y=x/2. Decide whether to integrate with respect to x or y. Then find the area of the region.

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

a contractor's crew can frame 3 houses in a week. how long will it take them to frame 54 houses if they frame the same number each week?

*asked on September 27, 2015* -
## Chemistry

a hydrocarbon is burnt completely in excess oxygen. it is found that 1.00g of the hydrocarbon gives 2.93g carbon dioxide and 1.80g water. find the empirical formula of the hydrocarbon (H=1,C=12,O=16)

*asked on May 10, 2018* -
## Calculus

Show that f(x) = 2000x^4 and g(x) = 200x^4 grow at the same rate I know that they grow at the same rate because they are both raised to the same power, but i don't know how to show it.

*asked on March 4, 2016* -
## math

A patio has the shape of the quadrilateral drawn in the picture below. 1) Find the area of the patio. 2) What is the minimum number of square-tiles with sides of 30 cm that are needed to cover the patio if 10% more tiles will be needed to cover the

*asked on March 7, 2019* -
## Pre cal

1. An airplane flies 200 km on course 110 degrees from point A to point B. At point B the pilot changes course to 37 degrees. The plane then flies 100 km to point C. Find the magnitude of the net displacement from A to C. 2. A plane is flying on a bearing

*asked on May 15, 2014* -
## math

a scooter is priced between $1000 and $2000. its price is a multiple of 10. All the digits in the price, except for the thousands digit, are even numbers. The value of the hundreds digit is 30 times the value of the tens digit. what is the price of the

*asked on October 26, 2015* -
## Calculus

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = 5 - x^2 on the interval 0 to sqrt 5 . If so, find the x-coordinates of the point(s) guaranteed by the theorem.

*asked on March 2, 2016* -
## Calculus

Use the graph of f(t) = 2t + 3 on the interval [-3, 6] to write the function F(x), where F(x)= ∫f(t) dt where a=3 b=x. F(x) = 2x^2 + 6x F(x) = 2x + 3 F(x) = x^2 + 3x + 54 F(x) = x^2 + 3x - 18 Honestly have no idea where to start. Do i take the derivative

*asked on February 23, 2016* -
## English

I think the answer is, because he is pretty much telling the people reform is needed. AFTER an unequivocal experience of the inefficiency of the subsisting federal government, you are called upon to deliberate on a new Constitution for the United States of

*asked on March 10, 2016* -
## physics

A circuit is powered by a 5 V battery and has 0.2 A of current through it. If the circuit contains two resistors connected in series and one of the resistors has a resistance of 5 Ω, what is the resistance of the other resistor?

*asked on May 8, 2018* -
## science

100.0g of 4.0c water is heated until its temperature is 37c. if the specific heat of water is 4.18 j/g c, calculate the amount of heat energy needed to cause this rise in temperature.

*asked on August 25, 2014* -
## geometry

prove that every segment is congruent itself

*asked on January 3, 2019* -
## Business

PLEASE HELP 1.Create a diagram of the U.S banking system and the Federal Reserve System(FRS). Include special financial services of the banking system in your diagram. Be creative in this activity. Pretend you have been asked to teach the structure and

*asked on March 22, 2018* -
## AP Physics - Work and Energy

A projectile is fired at an upward angle of 45 degrees from the top of a 265-m cliff with a speed of 185 m/s. What will be its speed when strikes the ground below? (Use conservation of energy.) I have a diagram of it but I don't know what equations to use.

*asked on October 15, 2009* -
## PHYSICS PLEASEEE

The distinction between mass and weight was discovered after Jean Richer transported pendulum clocks from Paris to French Guiana in 1671. He found that they ran slower there quite systematically. The effect was reversed when the clocks returned to Paris.

*asked on November 6, 2008* -
## math

By what percent will a fraction change if its numerator is decreased by 10% and its denominator is decreased by 50%?

*asked on May 5, 2018* -
## Chemistry

Human bodies maintain their balance (homeostasis) through a series of equilibria. An important equilibrium involves calcium ion because Ca2+ is important for muscle contractions in the heart as well as for strong bones. Bone is a complex tissue consisting

*asked on February 19, 2015* -
## algebra

An amusement park charges $8 admission and average of 2000 visitors per day. A survey shows that , for each $1 increase in the admission cost, 100 fewer people would visit the park. Write an equation to express the revenue, R(x) dollars, in terms of a

*asked on March 18, 2015* -
## Math

A craft project requires 5/6 yards of ribbon to make 4 refrigerator magnets.How many inches of ribbon are needed for each magnet?

*asked on August 30, 2016* -
## Chemistry

what is the pH of a 0.025 M aqueous solution of sodium propionate, NaC3H5O2? What is the concentration of propionic acid in the solution?

*asked on August 8, 2011* -
## AP Physics

A rope is tied to a pail of water and the pail is swung in a vertical circle of radius 1.3m. What must be the minimum velocity of the pail at the highest point of the circle if no water is to spill?

*asked on September 24, 2009* -
## geometry

Lines a and b are parallel. Line c is a transversal. Find the measures of all angles formed by a,b, and c, if: one of the angles is with 70° larger than the other one.

*asked on November 14, 2018* -
## Chemistry

Help me with this; For the second part of the analysis,you will be provided with hydrated crystal of oxalic acid (H2C204. 2H2O). weigh out accurately about 1.575g of oxalic acid in a weighing bottle. Dissolve the acid in a beaker, then transfer the

*asked on June 17, 2018* -
## check geo

a system in which monarchsd or lords gave land to nobles in return for pledges of loyalty was known as: A)industrial capitalism B)communism C)the middle Ages D)feudalism my choice:b

*asked on August 26, 2009* -
## language arts

15 literary devices in chapter 17 of to kill a mockingbird

*asked on September 30, 2011* -
## chemistry

What are the oxidation numbers for the elements in the compound C2H5COOH?

*asked on April 27, 2011* -
## chemistry

How many milliliter of 0.150 M H2SO4 (sulfuric acid) are required to react with 1.87 g of sodium hydrogen carbonate, NaHCO3, according to the following equation? H2SO4 + 2NaHCO3 --> Na2SO4 + 2H2O + 2CO2 dont understand this am i suppose to change 1.87 into

*asked on July 23, 2011* -
## algebra

A rectangular lot is bordered on one side by a stream and on the other three sides by 600m of fencing. Find the dimensions of the lot if area is a maximum.

*asked on March 18, 2015* -
## chemistry

4FeCr2O4+ 8K2CO3+7O2= 2Fe2O3+8K2CrO4+8CO2 how many grams of FeCr2O3 are required to produce 44g of CO2?

*asked on January 25, 2010* -
## math

What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y equals 27 minus x^2?

*asked on March 6, 2015* -
## Calculus 2

A farmer wishes to build a fence for 6 adjacent rectangular pens. If there is 600 feet of fencing available, what are the dimensions of each pen that maximizes total pen area? I keep getting x=150 but I have been told that is not enough fencing. Can anyone

*asked on April 10, 2013* -
## chemistry

A 200.0 mL flask contains 1.03 mg of O2 and 0.41 mg HE at 288K. Calculate the partial pressure of oxygen and helium in the flask. What is the total pressure?

*asked on August 4, 2011* -
## AP Physics - Linear Momentum

During a Chicago storm, winds can whip horizontally at speeds of 100 km/h. If the air strikes a person at the rate of 40 kg/s per square meter and is brought to rest, estimate the force of the wind on a person. Assume the person is 1.50m high and 0.50m

*asked on October 16, 2009* -
## Chemistry

a sample of natural gas is 85.2% methan, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this mixture @ 18C and 748mmHg. so i know that i have to use this formula d=(PM)/(RT) but i don't know how to convert the percentages into g/mol

*asked on August 4, 2011* -
## chemistry

The element copper has naturally occuring isotopes with mass numbers of 63 and 65. The relative abundance atomic masses are 69.2% for mass=62.93 amu, and 30.8% for mass=64.93 amu. Calculate the average atomic mass of copper.

*asked on September 7, 2009* -
## geometry

The difference of the same side interior angles of two parallel lines is 50°. Find the measures of these two angles. Answer: ______ &______

*asked on November 14, 2018* -
## math

One side of a rectangle is five times as long as the other side. If the perimeter is 72 meters, what is the length of the shorter side? ___ meters

*asked on March 10, 2018* -
## AP Physics - Work, Energy, Power

A driver notices that her 1150-kg car slows down from 85 km/h to 65 km/h in about 6 seconds on the level when it is in neutral. Approximately what power (watts and hp) is needed to keep the car traveling at a constant 75 km/h?

*asked on October 16, 2009* -
## geo check

a fine rich soil that is carried by the wind is known as: A)bauxite B)loess C)polder D)mistral im not sure it either b or d maybe d

*asked on August 24, 2009* -
## General Chemistry

Ferric Hydroxide, Fe(OH)3, is an insoluble salt with a solubility of 10^-39. 1) What is the maximum concentration of ferric hydroxide that can dissolve? 2) Using Le Chatalier's Principle, explain why iron (III) solutions are more soluble in acidic

*asked on May 20, 2016* -
## AP Physics - Equilibrium

Describe several situations in which an object is not in equilibrium even though the net force on it is zero. I can't think of a single one. I can think of the opposite (equilibrium with net force not being zero) but I don't get it the other way around.

*asked on October 29, 2009* -
## geometry

Lines a and b are parallel. Line c is a transversal. Find the measures of all angles formed by a,b, and c, if: one of the angles has measure of 150°.

*asked on November 14, 2018* -
## math

Find the area of a square with side A when a is equal to the following values. Are the area of a square and the length of its side directly proportional quantities? Why or why not? A=8 cm. The area of the square is _______ square cm. The area of the square

*asked on November 1, 2018* -
## physics

The positive and negative plates of a parallel-plate capacitor have an area of 1.05 cm by 1.05 cm. Their surface charge densities are +1.00×10-6 C/m2 and -1.00×10-6 C/m2, respectively. A proton moving parallel to the plates enters the middle of the space

*asked on January 24, 2017* -
## physics

Two cars leave the same point at the same time, each travelling at the same constant speed and each having the same mass. The first car drives directly east, while the second car heads directly north. If the centre of mass of the two-car system is

*asked on November 8, 2011* -
## Math

A chef buys 9 cucumbers 18 peppers and 21 tomatoes at the farmers market how much does she spend

*asked on October 29, 2018* -
## math

what property is described in this equation: 24x5=(20x5)+(4x5)

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

"How many different equivalent expressions for a particular number can be found?" Various constraints can be (and need to be) applied, such as the use of integers only, the number of expressions listed, a restricted choice of digits, or operations etc.

*asked on January 9, 2009* -
## Mathematics

A single cell divides in two every 5 minutes and each new cell continues to divide every 5 minutes. How long does it take for the cell population to reach at least 1 million?

*asked on February 26, 2018* -
## biology

1)Can you suggest reasons why a phylogeny based on molecular evidence and a phylogeny based on morphology and other evidence might not be exactly the same? 2) Zoologist worldwide are sequencing a mitochondrial gene CO1 (cyctochrome c oxidase subunit),

*asked on January 27, 2017* -
## Chemistry (concentrations)

A liquid mixture has 12.6 parts per thousand of MgCl2 dissolved. Calculate the [Cl-] in ppt? Im stuck plz help!

*asked on September 7, 2014* -
## check geo

when ___ the african slave trade greatly increased. a)AFRICANS BEGAN TO SHIP slaves to europe B)europeans needed more workers in the americas C)isalmic traders replaced europeans traders in western africa D)africans took arabs across the sahara. my choose

*asked on September 10, 2009* -
## chemistry

what is the volume occupied by 2 moles of ammonia at s.t.p(1mole of gas at s.t.p=22.4)

*asked on May 4, 2015* -
## World History

What role did the Jacobins play in the French Revolution? The Jacobins reached an agreement with moderate French leaders to end the revolution. The Jacobins opened French gov't to full participation by women. The Jacobins returned France to a monarchy by

*asked on March 27, 2014* -
## literature

When did the book To Kill a Mockingbird take place? Harper Lee wasn't specific about the dates, but apparently it took place in the mid 1930s. Check this background out. http://www.sparknotes.com/lit/mocking/context.html Yes, that's what I thought.

*asked on December 27, 2006* -
## Biology

Codominance is a form of inheritance in which two different alleles for a gene are both expressed, and neither allele is dominant over the other. The alleles for type A blood and type B blood are codominant. If a man who is homozygous for type A blood and

*asked on July 6, 2017* -
## Science(physics)

A boy while driving to his school covers at the average speed of 15km/h.On his return trip along the same route, covers at the average speed of 25km/h due to less traffic.What is the average speed for the whole trip

*asked on January 8, 2017* -
## Economics calculation help

Kelly total income last year was $24,000, but she could deduct $12,000 for various reasons. How can I calculate; If she had to pay 15% of her taxable income in federal income tax, what was her total tax payment? So I did 12,000 x .15 and got 1800, but I

*asked on December 4, 2014* -
## Chemistry

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is 1.86°C/m. (Note that when Ca(NO3)2 dissolves in water Ca2+ and NO32- ions are produced).

*asked on May 25, 2012* -
## world geo

in kazakhstan ______ led to radiation pollution. A)nuclear weapons B)biological weapons testing C)weapons transport system my choose is a. oil well fires ____ during the persian gulf war. A)threanted millions of birds B)destroyed millions of gallons of oil

*asked on September 4, 2009* -
## english

Which statement best describes the character of Nathalie? A. She is a flat character because her goal is to marry Brantain for his money. B. She is both flat and dynamic because she loves one man and marries another. C. She is a dynamic character because

*asked on September 24, 2018* -
## Geometry

A cone has diameter 12 and height 9. A cylinder is placed inside the cone so the base of the cylinder is concentric with the base of the cone and the upper base of the cylinder is contained in the surface of the cone. If the volume of the cone is nine

*asked on May 9, 2017* -
## Calculus

Find the range of the function ∫sqrt(4-t^2) dt where a=0 =x [0, 4π] [0, 2π] [-4, 0] [0, 4]

*asked on March 4, 2016* -
## physics

At 15 minutes past the hour, a 50 g mouse runs up a grandfather clock and sits himself down at the end of the minute-hand. If the minute-hand for the clock is 16 cm long, what is the magnitude of the torque exerted by the mouse on the minute-hand? Give

*asked on November 15, 2011*