# Casey

Most popular questions and responses by Casey-
## Calculus

A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store

*asked on March 3, 2012* -
## Chemistry

An unknown compound contains only C, H, and O. Combustion of 4.50 g of this compound produced 10.2 g of CO2 and 4.19 g of H2O. What is this empirical formula of the unknown compound?

*asked on September 21, 2013* -
## chemistry

write and equation for the reaction of triethylamine and water. does the eqilibrium go to the right or left. so far what I have is C6H15N + H2O but I'm not sure of the products

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

1.A block accelerates at 3.1 m/s2 down a plane inclined at an angle 24.0◦. Find μk between the block and the in- clined plane. The acceleration of gravity is 9.81 m/s2 . 2.A 1200 kg car moves along a horizontal road at speed v0 = 20.1 m/s. The road is

*asked on November 2, 2016* -
## Physics Block and ramp

A crate of mass 0.812 kg is placed on a rough incline of an angle 35.3 degrees. Near the base of the incline is a spring of spring constant 1140 N/m. The mass is pressed against the spring a distance x and released. It moves up the slope 0.169 meters from

*asked on June 6, 2011* -
## chemistry

An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. what is the molality of silver nitrate in the solution?

*asked on June 12, 2011* -
## int.science gtg in 8 min.

How much heat is contained in 100 kg of water at 60.0 °C? Be mindful of significant figure rules for both multiplication and addition. 30 kcal 2.10 x 104 kcal 2.40 x 104 kcal 2.77 x 104 kcal

*asked on November 20, 2014* -
## Calculus Max/Min Prob

At 7:00 am, one ship was 60 miles due east from a second ship.If the first ship sailed west at 20 mph, and the second ship sailed southeast at 30 mph, at what time are they closest together?

*asked on May 10, 2012* -
## Chemistry

What volume of 0.300 M Na3PO4 is required to precipitate all the lead(II) ions from 140.0 mL of 0.400 M Pb(NO3)2? I desperately need help with this, I cannot figure it out, my mind is bleeding.

*asked on June 17, 2010* -
## Int.Science/laws of thermodynamics

Watch the heat engine animation in the lesson text above. Does this animation illustrate a "new and improved" heat engine? yes no

*asked on November 24, 2014* -
## chem-carbs

D-ribose is treated with a mild oxidizing agent. What is the product of this reaction?

*asked on March 12, 2012* -
## Algebra

A ball is thrown into the air. The height h, in feet, of the ball can be modeled by the equation h= -16t^2+20t+6, where t is the time, in seconds, the ball is in the air. When will the ball hit the ground? first should I use x= -b/2a?

*asked on June 6, 2013* -
## Int.Science

How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C? Be mindful of significant figure rules for both multiplication and addition. 450 kcal 430 kcal 280 kcal 130 kcal

*asked on November 20, 2014* -
## Alg 1

The popultion of Medford High is 800 students & the population of WEstville High is 1240 students. Medfords pop. has been increasing by 30 students per year, while westville has been decreasing by 25 students per year. In how many yearas will the

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

All of the following items are expressed in the subjunctive except _____. a wish a condition contrary to fact a that clause expressing necessity a statement of fact

*asked on November 20, 2014* -
## science

1. If you turn on the burner on a gas stove under a pan of cold water, energy moves from the burner to the pan of water. What is this type of energy transfer called? 2. If you burn wood in a fireplace, which type of energy resource are you using? 3. Which

*asked on December 12, 2018* -
## Math

A population of 75 foxes in a wildlife preserve quadruples in size every 15 yr. The function y= 75 * 4^x , where x is the number of 15 yr periods, models the population growth. How many foxes will there be after 45 years?

*asked on March 7, 2013* -
## Int.science/Laws of Thermodynamics

The efficiency of the engines in the two previous problems are the same, comparing the input and output temperatures. True False

*asked on November 21, 2014* -
## Science

If a mineral sample has a mass of 10 g, how many grams of oxygen does it contain? You need more information than that to determine the amount of oxygen or any other element in the mineral. Your question is the same kind as, "My car was in the rain today.

*asked on December 9, 2006* -
## Chemistry

Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 Would it be C?

*asked on November 8, 2009* -
## biology

most of the total mass of a plant comesfrom which source? Nitrogen Oxygen Carbon Dioxide Water Hydrogen Is is carbon dioxide?

*asked on August 30, 2009* -
## Physics

A binary star system consists of two equal mass stars that revolve in circular orbits about their center of mass. The period of the motion, T=29.6 days, and the orbital speed v= 220 km/s of the stars can be measured from telescopic observations. What is

*asked on July 12, 2011* -
## Statistics

Please Help! If someone could just show me how to do a problem like this! The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount

*asked on October 29, 2013* -
## Chemistry

1. Suppose o2, n2 and Ar were placed at 1.00 atm and 273 K in closed containers. A tiny hole is opened in each container, allowing each gas to diffuse into another container filled with neon gas. What is the ratio of the rate of diffusion of nitrogen to

*asked on May 22, 2015* -
## algebra

Write an inequality that describes the region of the coordinate plane not included in the graph of y

*asked on February 7, 2013* -
## Chemistry

If 10.0g of CaCl2 and 10.0g of NaCl are dissolved in 100.0mL of solution, what is the concentration of chloride ions? I found the molar mass of CaCl2 is 111.0g/mol; the molar mass of NaCl is 58.44g/mol. I divided 10g CaCl2/111.0g CaCl2 I divided 10g

*asked on July 12, 2010* -
## Calculus

Suppose the revenue from producing and selling x units of a given product is given by R(x)=10x-0.02x^2 a) Find the number of units produced if the revenue is $800. I really need help with this, I don't know what to do?

*asked on February 3, 2012* -
## Earth Science

Please determine the noon sun angle at the given latitudes on April 11: 40 degrees north 0 degrees

*asked on October 29, 2010* -
## chemistry

Nitrogen gas can be prepared by passing gaseous ammonia over solid copper (II) oxide at high temperature. The other products of the reaction are solid copper and water vapor. If a sample containing 20.3 g of NH3 is reacted with 95.8 g of copper oxide 1.

*asked on November 8, 2016* -
## ALGEBRA

A farmer has 165 feet of fencing material in which to enclose a rectangle area. He wants the length x to be greater than 50 feet and width y to be no more than 20 feet. write a system to represent this situation.

*asked on March 13, 2011* -
## Statistics

The heights of American women ages 18 to 29 are normally distributed with a mean of 64.3 inches and a standard deviation of 3.8 inches. An American woman in this age bracket is chosen at random. What is the probability that she is less than 70 inches tall?

*asked on July 7, 2017* -
## English

In American English, a collective noun used as a unit takes _____ verbs and pronouns. singular plural

*asked on November 24, 2014* -
## Physics

In an intense battle, gunfire is so intense that bullets from opposite sides collide in midair. Suppose that one (with mass M= 5.12 g moving to the right at a speed V= 214 m/s directed 21.3 degrees above the horizontal) collides and fuses with another with

*asked on June 28, 2011* -
## Physics - Spring gun

A spring gun is made by compressing a spring in a tube and then latching the spring at the compressed position. A 4.87-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 4.87 cm, and it takes a force of

*asked on May 29, 2011* -
## trigonometry

simplify sin7x-sin3x as a product of trig functions.

*asked on April 19, 2011* -
## Earth Science

How many hours of daylight occur at the following locations on the specified dates? March 22 ---------------- 40 degrees north 0 degrees 90 degrees south December 22 ---------------- 40 degrees north 0 degrees 90 degrees south

*asked on October 29, 2010* -
## English/concrete nouns

Select all of the concrete nouns. iron anger faith toolbox perseverance lamb grace tooth I think it's B,C,E, and G

*asked on November 21, 2014* -
## math 6th grade

a tiger can eat 15% of his body weight he eats 75lbs how much does he weigh

*asked on December 11, 2013* -
## Physcis

An object slides without friction in a bowl shaped like a hemisphere. It is released from rest at one edge of the bowl, slides up the other side before stopping right on the edge of the bowl. During which part of this process is the power being delivered

*asked on June 22, 2011* -
## physics

a proton (mass 1.67 x 10^-27 kg) with a velocity of 1.10 x 10 7 m/s collides with a motionless helium nucleus, and the proton bounces back with a speed of 6.00 x 10 6 m/s. The helium nucleus moves forward with a velocity of 4.00 x 10 6 m/s after the

*asked on March 24, 2013* -
## Algebra 2

The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which the boat travels in still water is 5 times the rate of the river current, what is the rate of the current? Which of the

*asked on October 13, 2012* -
## Statistics

A lottery ticket has a grand prize of $28 million. The probability of winning the grand prize is .000000023. Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Show your calculations and reasoning clearly.

*asked on August 29, 2010* -
## chemistry

What volume of 4.50M HCl can be made by mixing 5.65M HCl with 250 mL of 3.55M HCl?

*asked on July 24, 2010* -
## Science

Draw the Lewis structure for N2H2, a neutral molecule.

*asked on September 7, 2009* -
## ENGLISH SUPER QUICK QUESTION

Identify the word in italics. This is the dog I was telling you about. demonstrative pronoun indefinite pronoun interrogative pronoun relative pronoun not a pronoun

*asked on September 26, 2014* -
## Physics

A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's

*asked on December 4, 2012* -
## Physics - pulley

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.5 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. I have

*asked on June 3, 2011* -
## social studies; AP US

the main reason why the United States had few foreign investments before 1890 was that a. the american people did not believe in imperialism b. congress had prohibited all loans to foreign countries c. the development of the west offered a profitable field

*asked on January 19, 2009* -
## Int.science

An inverse relationship can be represented by: a straight line a bar chart

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

An automobile gasoline tank holds 20.0 gal when full. How many pounds of gasoline will it hold if the gasoline has a density of 0.560 g/mL?

*asked on September 10, 2012* -
## Chemistry

1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP.

*asked on September 27, 2016* -
## history

What caused the fiords in Scandinavia? earthquakes erosion glaciers floods

*asked on September 26, 2014* -
## Organic Chemistry

Explain why methanol and acetone are not suitable solvents for extracting organic compounds from aqueous solutions.

*asked on January 21, 2010* -
## Calculus

A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the deep end, and 3 feet deep at the shallow end; the bottom is rectangular. If the pool is filled by pumping water into it at the rate of 40 cubic feet per minute, how fast is the water level

*asked on March 2, 2012* -
## Physics

At what speed would a 1140-kg car have the same momentum as a 12,600-kg truck traveling at 25 km/hr? The hint given to this problem is that I need to find the velocity of the car and truck. Converting 25 km/hr to m/s I get 6.944 m/s as the initial

*asked on June 26, 2011* -
## CHEMISTRY

How many grams of CH4 are required to produce 43 g of Cu according to the following equation: 4CuO + CH4 --> CO2 + 2H20 + 4Cu? I already tried to work the problem myself, and I may have gotten this right, but I do not have an answer key to compare to.

*asked on July 10, 2010* -
## math

Will, micah and sue went to dinner. Will paid 1/3 of the dinner bill. Micah and Sue paid in the ratio of 2:5. If Sue paid $6. more than Will, how much did the dinner cost ?

*asked on December 23, 2016* -
## English/ms.sue

Select the complete subordinate clause (including all modifiers). I aced my test because I remembered to study. I aced my test my test because my test because I remembered to study because I remembered because I remembered to study This sentence does not

*asked on September 26, 2014* -
## Physics

A parachutist with mass 79.7 kg jumps from an airplane traveling at a speed vi= 112 km/hr at a height H = 2570 m. He lands with a speed of vf = 5.21 m/s. What is the change in mechanical energy (J) of the earth- parachutist system from just after the jump

*asked on June 18, 2011* -
## trig

convert the point with polar coordinates (2,7pi/6) into rectangular coordinates.

*asked on April 19, 2011* -
## Government

Why didn't Georgia send delegates to the First Continental Congress? They were the only state that didn't and i have a theory but i'm not quite sure. Just wanted to get others thoughts. Thank ya!

*asked on September 30, 2007* -
## INTSCIENCE

The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

*asked on November 24, 2014* -
## Accounting

In its first month of operations, Cisler Company made three purchases of merchandise in the following sequence: (1) 300 units at $6, (2) 400 units at $8, and (3) 500 units at $9. Assuming there are 200 units on hand at the end of the period, compute the

*asked on February 27, 2012* -
## Math

Determine if it is always sometimes never or always true - ray LJ and ray TJ are opposite rays -the intersection of two planes is a point

*asked on September 12, 2011* -
## algebra

Suppose the speedometer in your car reads 55.0 mph also written as mile/hour. What is your speed in m/sec? (1 km = 0.621 mi.) unit factor methond soooo lost on this one please help!!!

*asked on April 3, 2011* -
## Trig problem

What is a coterminal angle with 170 degrees?

*asked on August 14, 2009* -
## Int.science

Which of the following statements is true? A hypothesis is created at the end of an experiment. The dependent variable is changed by the experimenter. The best hypotheses are written as answers to a question. Observations are often used to form questions

*asked on October 2, 2014* -
## Physics

A cart loaded with bricks has a total mass of 25.4 kg and is pulled at constant speed by a rope. The rope is inclined at 30.6 ◦ above the horizontal and the cart moves 18.4 m on a horizontal ﬂoor. The coeﬃcient of kinetic friction between ground and

*asked on October 13, 2013* -
## Algebra

A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

*asked on April 23, 2013* -
## Calculus- please help

A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store

*asked on March 4, 2012* -
## Chemistry

What is the % by mass of chlorine in CH2Cl2? I calculated the molar mass of CH2Cl2 which is 84.93. I than calculated the molar mass of Cl2 which was 70.9. Than I divided 70.9 by 84.03 and my percent by mass of chlorine is 83.5 percent. Is this correct?

*asked on July 10, 2010* -
## Chemistry

Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 how do you figure out the answer to this question?

*asked on November 8, 2009* -
## Chemistry

1)Calculate the number of mL of a 0.095 M NaOH solution required to neutralize 25.0 mL of 0.15 M acetic acid solution 2) Calculate the molarity of a sodium hydroxide solution if 22.0 mL of the sodium hydroxide is required to neutralize 0.50 g of KHP.

*asked on September 27, 2016* -
## 8th grade math

I am in 8th grade math as a sixth grader. I am stuck on one problem. It is this: You are making a necklace that is 9 inches long. You use 6 beads for each inch. what integer is the change in your supply of beads after making the necklace?

*asked on August 31, 2015* -
## AP Chemistry

So I have the reaction 2HBr(g) H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, to find delta G I did products -

*asked on April 8, 2013* -
## Calculus

Q. An open-top box with a square base is to have a volume of 62.5 square inches. What dimensions will yield the box of minimum surface area? I am getting 5" by 2.5" but not sure.

*asked on March 3, 2012* -
## physics

Monochromatic light with a wavelength of 5.0 E -7 meter passes through two narrow slits, producing an interference pattern on a screen 3.0 meters away. The first order bright band lines 2.0 E -2 meters away from the central bright maxima. What is the

*asked on June 10, 2010* -
## English

Select all that apply. Some of the characteristics of a good business letter are _____. accuracy brevity clarity colloquial style A and C?

*asked on November 20, 2014* -
## history

Which mountains lie between Spain and France? Rocky Pyrenees Alps Andes

*asked on September 26, 2014* -
## US Government

In the beginning of our nation seats were reapportioned after the first three years, but today we reapportion seats in the House every 10 years. A) True B) False

*asked on July 12, 2014* -
## Calculus

A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store

*asked on March 3, 2012* -
## Accounting

In its first month of operations, Cisler Company made three purchases of merchandise in the following sequence: (1) 300 units at $6, (2) 400 units at $8, and (3) 500 units at $9. Assuming there are 200 units on hand at the end of the period, compute the

*asked on February 26, 2012* -
## Physics- bungee jump

A tall bald student (height 2.1 meters and mass 91.0 kg) decides to bungee jump off a bridge 36.7 meters above the river. The bungee cord is 25.3 meters long as measured from the attachment at the bridge to the foot of the jumper. Treat the bungee as an

*asked on June 6, 2011* -
## math

find the diameter of a circle if the circumference is 8cm round to the nearest tenth

*asked on January 21, 2010* -
## science

h t t p: / / tinypic . co m/r/f2vw1w/3 In the link above (take out the spaces) there is supposed to be a picture representing a foodweb. 1. Which letter is the producer? Is it A? 2. I'm not sure what B and C would represent? A. producer B. primary consumer

*asked on August 30, 2009* -
## Statistics

Salaries of 50 college graduates who took a statistics course in college have a mean, x of $68,200. Assuming a standard deviation, σ, of $12,279, construct a 95% confidence interval for estimating the population mean μ.

*asked on November 28, 2016* -
## Business math

Compute the difference between the ordinary interest and the exact interest for a loan with a principle amount of $1100 at 12 percent for 120 days. I'm getting $0.60 Can you check my work?

*asked on February 21, 2015* -
## Int.science/Laws of Thermodynamics

The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True False

*asked on November 21, 2014* -
## US Government

The major television networks' share of viewers was greatly reduced by the growth of A) newspapers B) PBS C) cable television D) political parties

*asked on July 9, 2014* -
## Chemistry

Suppose the atmospheric pressure during the experiment was 751 mmHg. The temperature of the water was found to be 23.0 degrees celsius. What is the pressure of the oxygen gas, Po2 that is produced?

*asked on September 27, 2012* -
## Chemistry

Assuming that the smallest measurable wavelength in an experiment is 0.410 fm (femtometers), what is the maximum mass of an object traveling at 815 m*s^-1 for which the de Broglie wavelength is observable?

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

At car (1140-kg)traveling at 76.04 m/s and truck (12600-kg)traveling 6.88 m/s have a head-on collision and then stick together. What is their final common velocity (m/s)? (assume the car is going in the positive direction) What is the cars' change in

*asked on June 29, 2011* -
## Physics

At car (1140-kg)traveling at 24.8 m/s and truck (12600-kg) have a head-on collision and then stick together. What is their final common velocity (m/s)? (assume the car is going in the positive direction) What is the cars' change in momentum in the above

*asked on June 29, 2011* -
## Chemistry

For which of the following reactions is the value of Delta H rxn equal to Delta H of formation? I. 2Ca(s) + O2(g) --> 2CaO(s) II. C2H2(g) + H2(g) --> C2H4(g) III. S(s) + O3(g) --> SO3(g) IV. 3Mg(s) + N2(g) --> Mg3N2(s). According to my answer key, the only

*asked on July 11, 2010* -
## Chemistry

If 10.0g of CaCl2 and 10.0g of NaCl are dissolved in 100.0mL of solution, what is the concentration of chloride ions? (the molar mass of CaCl2 is 111.0g/mol; the molar mass of NaCl is 58.44g/mol. I found individual molar mass of: Ca-40.08 Cl-35.45 Na-22.99

*asked on July 11, 2010* -
## CALCULUS

How do I do this: add the following vectors , 7m/s [N30E] and 2m/s [S17E] I know that you must use trigonometry and break stuff up into components and use sine and cosine law; just not sure how. Thanks!

*asked on June 28, 2008* -
## math

Which of the following does not always bisect at least one side Midsegment Perpendicular bisector Median Altitude

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

Let's consider the practice known as female genital mutilation that is very common in many African and Middle Eastern cultures. Since these are performed outside of the U.S., our laws don't apply, but there are many people who argue that we should impose

*asked on February 16, 2015* -
## int.science

The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

*asked on November 24, 2014* -
## Algebra 1

Given: 5x - 6y = 0. What is the x-intercept? (0, 0) (-1/5, 0) (0, 1/6) no intercept

*asked on October 24, 2014*