# Louis

Most popular questions and responses by Louis-
## Calculus

The base of a solid in the xy-plane is the circle x^2+y^2 = 16. Cross sections of the solid perpendicular to the y-axis are semicircles. What is the volume, in cubic units, of the solid? a. 128π/3 b. 512π/3 c. 32π/3 d. 2π/3

*asked on March 21, 2017* -
## Math

Two faucets can fill a tank in 1 hour and 20 minutes. The first faucet takes more than two hours longer to fill the same tank when functioning without the second tap. How long does it take to fill each one separately? Explain your solution

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

Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. The lasers produce separate interference patterns on a screen a distance 4.90m away from the slits a)What is the

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

Calculate the consumers' surplus at the indicated unit price p for the demand equation. HINT [See Example 1.] (Round your answer to the nearest cent.) p = 150 − q; p = 30

*asked on July 15, 2011* -
## physics

A football is thrown from the edge of a cliff from a height of 22 m at a velocity of 18 m/s [39degrees above the horizontal]. A player at the bottom of the cliff is 12 m away from the base of the cliff and runs at a maximum speed of 6.0 m/s to catch the

*asked on February 23, 2014* -
## math

a job pays a salary of 18,000 the first year. during the next 18 years,the salary increases 7% each year.what is the total lifetime salary over 19 years

*asked on June 26, 2016* -
## math

16. A picture of a star has 6 identically matched points. What is the least number of degrees that you can rotate the star onto itself? (1 point) 60° 120° 180° 240 How do i figure this out?

*asked on March 3, 2015* -
## Chemistry

what is the balanced equation of: Combination reaction: Li2O(s)+H2O(l)-->(?) I know what a combination reaction is but I don't know how to do it when it is complex like this one.

*asked on April 20, 2010* -
## math

At the end of the summer, Walgreens advertised blow-up pools for 66% off the regular price. Jeff Jones saw a pool with a regular price of $49.99. What is the dollar markdown? A. $33.99 B. $39.29 C. $32.99 D. $33.39

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

Lyle is putting his videotapes on a shelf.the shelf is 12 inches long.if each videotape is 1 1/2 inches wide,how many videotapes can he put side by side on the shelf?

*asked on October 5, 2014* -
## Physics

A daring 510-N swimmer dives off a cliff with a running horizontal leap. What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

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

Need help solving this problem. A 0.188g sample of unknown metal, X (s), produced 71.4ml of hydrogen gas when reacted with HCl according to the equation: X(s)+2HCl(aq)--> XCl2(aq)+H2(g) The gas was collected over water at 23 degrees C. The levels of water

*asked on September 5, 2011* -
## Math

Using a standard deck of 52 cards how many 5 card hands contain A. 2 queens? B. 3 fives? C. At most 2 sevens? D. One pair and one three of a kind?

*asked on March 2, 2018* -
## phakamani secondary school

business,tourism.economics,maths literacy.whch requement are needed.

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

What is the pH when 25 mL of .20 M CH3COOH has been titrated with 35 mL of .10 M NaOH?

*asked on November 29, 2010* -
## Math

Solve each equation. Write each equation in simplest form. -6q + 5.8 = 23.8 A q = 3 B q = -3** C q = 1.83 D q = 4.93

*asked on September 18, 2016* -
## Science

We made t-pentyl Chloride in Lab today using HCl and t-pentyl alcohol. I know t-pentyl chloride is not soluble in water, but I'm still not sure the answer to some of my post lab questions. I've answered a few, but I have 3 that still confuse me. We

*asked on October 12, 2011* -
## physics

Two boys on skates push off from each other. The 40 kg boy moves to the left at 10 m/s. If the other boy moves to the right at 8 m/s, what is his mass?

*asked on June 13, 2012* -
## Math

Combine like terms: 1. -21a + 16a A -5a B 5a C 37a D -37!@#$%^& 2. 5 (x + 10) + x A 6x + 15 ** B 5x + 15 C 6x + 50 D 4x - 50

*asked on September 18, 2016* -
## physics

An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity?

*asked on June 13, 2012* -
## Calculus

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3 − 16x on the interval [−1, 1]. If so, find the x-coordinates of the point(s) guaranteed to exist by the theorem. f(a)=15 f(b)=-15 f'(x)=3x^2-16 f'(c)=-15 I am now lost

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

A man holds a child on his shoulders while watching a football match.How much work has he done if the game lasts for 2 hours?

*asked on February 9, 2019* -
## maths-probability

A family has four children. The probability of having a girl is 1/2. What is the probability of having 2 girls followed by 2 boys?

*asked on April 16, 2008* -
## Calculus

The region in the first quadrant bounded by the x-axis, the line x = π, and the curve y = cos(cos(x)) is rotated about the x-axis. What is the volume of the generated solid? a. 1.921 b. 3.782 c. 6.040 d. 8.130

*asked on March 21, 2017* -
## physics

A tennis ball is struck and departs from the racket horizontally with a speed of 26.9 m/s. The ball hits the court at a horizontal distance of 18.1 from the racket. How far above the court is the tennis ball when it leaves the racket?

*asked on February 6, 2013* -
## Math

Solve the equation. 1. y-5/3 =1 A -2 *** B 8 C 18 D 6 2. 6x + 29 =5 A -4 B -18 ** C 204 D -144

*asked on September 18, 2016* -
## chemistry

Say you have two substances, A and B. A has a melting point of 300 degrees Celcius, while B has a melting point of 200 degrees Celcius. If you took a mixed melting point where the ratio of A is higher than B, what would the melting range look like? Would

*asked on January 25, 2014* -
## Physics help!!

Assume: A 78 g basketball is launched at an angle of 56.8◦ and a distance of 10.4 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as

*asked on October 20, 2011* -
## Math

Akite is 15m up in the sky. The angle the string makes with the ground is 50 degrees. How long is the kite string?

*asked on September 4, 2007* -
## Math

A pizza company has 15 toppings to choose from A. One topping is anchovies. How many different 3 topping pizzas do not include anchovies? B. There are 6 vegetable toppings. How many different 3 topping pizzas have no vegetables? C. How many different 3

*asked on March 2, 2018* -
## physics

An eagle is flying horizontally at 5.8 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?

*asked on February 6, 2013* -
## chemistry

The specific heat of a certain type of metal is 0.128 J/(g·°C). What is the final temperature if 305 J of heat is added to 53.3 g of this metal initially at 20.0 °C?

*asked on March 3, 2013* -
## Social studies

History of social studies in britain

*asked on August 11, 2010* -
## Pre-Calc

Find all solutions of the equation in the interval [0, 2pi). Show all work. sin(x+(pi/6))-sin(x-((pi/6))=1/2

*asked on January 28, 2015* -
## physics

A missile is fired horizontally with an initial velocity of 300 m/s from the top of a cliff 200.0 meters high. a. How long does it take the missile to reach the bottom the cliff? b. How far from the base of the cliff does the missile strike the ground?

*asked on December 12, 2013* -
## economics

in the simple economics of a competitive market price increases under which condition: a) demand is constant. supply declines b) demand decreases. supply increases c) demand and supply rise concomitantly d) demand and supply decline concomitantly

*asked on April 30, 2008* -
## math

a rectangular mural is painted on a wall. if the mural is 12ft wide and covers 86.4sqft,what is the height of the mural?

*asked on December 3, 2007* -
## calculus

Calculate the left Riemann sum for the given function over the given interval, using the given value of n. (When rounding, round answers to four decimal places.) f(x) = e^−x over [−6, 6], n = 6

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

A 185.325 g sample of a compound of carbon, nitrgoen and hydrogen is burned completely. Calculate the empirical formula if 225.0 g of water and 230.0 g of NO2 is formed. In another experiment the sample was found to have a density of 10.9 g/L at 1.20 atm

*asked on September 18, 2011* -
## Math

The trigonometry practice exam has 6 questions with the answer A 8 questions with the answer Baby 10 questions with the answer C and 9 questions with the answer D The number of different answer keys that can be created with the letters above is A. 2.27 ×

*asked on March 2, 2018* -
## Physics

A truck travels beneath an airplane that is moving 120 km/h at an angle of 24◦ to the ground. How fast must the truck travel to stay beneath the airplane?

*asked on October 9, 2011* -
## Chemistry

Nickel metal reacted with oxygen: Ni (s) + O2 (g) --> Ni2O3 (s). 95.00g of Nickel is reacted with 2.000L oxygen at 10.56 atm and 30.00 degrees Celsius. At the end of the reaction the pressure was reduced to 7.56 atm at the same temperature and volume. How

*asked on September 18, 2011* -
## Science

Air is composed of nitrogen, oxygen, argon, carbon dioxide, and other gasses. How may air be best described? a) a compound b) a mixture c) a solution d) an alloy e) an amalgam

*asked on April 30, 2008* -
## maths-probability

You get to throw a die. If you roll a 3, you win $6. If you roll a 1 or a 5, you win $3. If you roll an even number, you lose $6. Find your expectation for this game.

*asked on April 16, 2008* -
## Math

1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts $29.95 per can and there is a 12% tax. How much would it cost to paint the ceiling?

*asked on February 6, 2013* -
## chemistry

How many grams of gaseous required? If 0.260 mol of solid C and 20.0 g of solid TiO2 are reacted stoichiometrically according to the balanced equation, how many grams of gaseous Cl2 are required? 3TiO2(s) + 4C(s) + 6Cl2(g) → 3TiCl4(l) + 2CO2(g) + 2CO(g)

*asked on February 17, 2010* -
## Chemistry

A piece of Na metal undergoes a complete reaction with H2O (l0 to produce sodium hydroxide and hydrogen. If 24.0 g of Na in a 3.50 L container is reacted with an excess amount of water at 25 degrees Celsius, calculate the total pressure (in atm) in the

*asked on September 18, 2011* -
## chemistry

if i have a molar concentration of acetic acid.046 mol/L how do i get the calculated molar mass of acetic acid

*asked on November 18, 2010* -
## Business-Economics

Describe any current or past news events related to wage inequality in the steel industry

*asked on June 12, 2008* -
## Math

Determine the number of different six letter arrangements that can be formed with the letters GUIDEPOST if the last two letters must be vowels?

*asked on March 2, 2018* -
## Math

Solve for x 2 (3+x)= 5x+54

*asked on April 26, 2016* -
## physics

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was

*asked on October 6, 2013* -
## physics

A ball is thrown at 19 m/s at 41° above the horizontal. Someone located 30 m away along the line3 of the path starts to run just as the ball is thrown. How fast, and in which direction, must the catcher run to catch the ball at the level from which it was

*asked on October 6, 2013* -
## TO MS SUE

REMEMBER WHEN I POSTED THIS QUESTION. 1 litre can of paint covers 11m squared. How many cans of paint would you need to cover a perfectly square ceiling that has a side length of 5.2 m? If paint caosts $29.95 per can and there is a 12% tax. How much would

*asked on February 7, 2013* -
## Math HELP PLEASE

1.My family went to starbucks. My daughter and myself ordered drinks that were the same price. My son's drink was 5.00 dollars more than my drink. The total bill was $18.50. How much was each drink? 2.There were candies on the table. Andy grabbed 50% of

*asked on January 12, 2013* -
## physics

a spacecraft is traveling in space fa from any planets or stars. How much force is required to maintainthe spacecraft's speed?

*asked on June 13, 2012* -
## health accounting

explains the relationship between finance and accounting, and how they operate to determine financial viability within a health care organization.

*asked on January 25, 2012* -
## Physics

An airplane ﬂies 137 km due west from city A to city B and then 412 km in the direction of 46.5◦ north of west from city B to city C. What is the distance between city A and city C? Relative to city A, in what direction is city C? Answer with respect

*asked on October 9, 2011* -
## Math

How many possible numbers are between 1 and 1000000000 that are greater than 72000 if we only use the following digits (4, 5, 6, 7, 8)

*asked on March 2, 2018* -
## math- Calc

a spherical balloon is filled with water. if the water is leaking out at a rate of 2 cm^3/min, find the rate at which the radius is changing when the volume is v=1000cm^3?

*asked on April 22, 2014* -
## Math

I posted these questions earlier a lot of times but noone answered them and i really need help so can someone help me. i don't want all the answers, can someone just do like the first 2 so i get an example of how to do them. thanks 1. represent each with

*asked on May 18, 2013* -
## Math 4 questions

I posted these questions earlier but noone answered them and i really need help so can someone help me. 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L

*asked on May 18, 2013* -
## Garde 12 Calc

Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :)

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

A person walks 28.2◦ north of east for 3.33 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk?

*asked on October 8, 2011* -
## Algebra

Find the 20th digit of 1.8984375E-20

*asked on June 23, 2011* -
## College Geology Homework

Suppose you have a sample of potassium feldspar from a rhyolite and you measure the ratio of atoms of 40Ar to 40K of 0.024 to 1, or for every 10000 atoms of 40K you find 240 atoms of 40Ar. For this problem, consider the decline of 40K from an initial value

*asked on October 20, 2010* -
## algebra

7n + the squareroot of n =18

*asked on January 1, 2009* -
## chemistry

What is the chemical composition of ozone, carbon dioxide, salt and water

*asked on November 17, 2008* -
## economics

Entrepreneurs in the shoeshine stand business earn 11000 a year Joe pays the rent of 500 a year and his total revenue is 16000 a year.he borrowed 600 at 20 percent a year to buy equipment.at the end of the year Joe offered 400 for his business and all his

*asked on November 22, 2015* -
## ALGEBRA 1 HELP

Your hole punch makes holes in your that have diameter of 4^-1 inch. a.Write an expression for the area of one punched hole. Use the formula for the area of a circle A=:r^2. (: is pi sign) b.Your hole punch makes three holes in a page . Write an expression

*asked on December 5, 2013* -
## physics

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;

*asked on October 7, 2013* -
## Math help urgent

I have a few questions that i need help with so can someone pleese help me thanks:) 1. represent each with an ineqaulity a.) time spent on the activity can be at most 13 mins b.) the volume of the container must be a minimum of 1.8 L and a max of 2.5 L 2.

*asked on May 18, 2013* -
## science

how might the shape of the hairlike structures relate to their function? Thanks.

*asked on April 5, 2013* -
## physics

A soccer player kicks the ball toward a goal that is 18.0 m in front of him. The ball leaves his foot at a speed of 19.3 m/s and an angle of 27.0 ° above the ground. Find the speed of the ball when the goalie catches it in front of the net.

*asked on February 6, 2013* -
## physics

A rocket is fired at a speed of 91.0 m/s from ground level, at an angle of 49.0 ° above the horizontal. The rocket is fired toward an 21.4-m high wall, which is located 25.0 m away. The rocket attains its launch speed in a negligibly short period of time,

*asked on February 6, 2013* -
## math

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)

*asked on November 26, 2012* -
## Physics

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 35.4 m/s. At the same time, it has a horizontal velocity of 57.2 m/s. At what speed does the vehicle move along its descent path? At what angle with the

*asked on October 9, 2011* -
## Chemistry

Helium gas is added to a 2.00 L container at 23 degrees Celsius containing Neon and Argon with a pressure of 725.3 mm Hg, what is the mass of Nitrogen added if the pressure is increased by 50%.

*asked on September 18, 2011* -
## poem

How do the differences and/or similarities between speech and poetic form affect the experience "In Memoriam"

*asked on May 8, 2011* -
## Physics

Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness

*asked on March 10, 2011* -
## economics

in general the role of board of directors is to: a) direct the day-to-day activities of the firm b) represent investor interests in management of the firm c) insure that the firm operates legally d)provide staff assistance to the CEO in strategic matters

*asked on April 30, 2008* -
## Health

Carbohydrates, protains, and ____________ are the macronutrients. a) Lipids b) vitamins c) antioxidants d) minerals

*asked on April 30, 2008* -
## Maths probability

You get to throw a die. If you roll a 3, you win $6. If you roll a 1 or a 5, you win $3. If you roll an even number, you lose $6. Find your expectation for this game.

*asked on April 15, 2008* -
## Maths probability

Numbers is a game where you bet $1.00 on any three-digit number from 000 to 999. If your number comes up, you get $750.00. Find the expected winnings.

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

I'm in gr 11 doing Trigonometry 14.2 = b ---- ---- sin38 sin 67 a = 46 --- ---- sin20 sin130 (10.7)^2 = (9.5)^2 + (12.4)^2 - 2(9.5)(12.4) cos

*asked on September 23, 2007* -
## Computer graphics

Determine the equation for a cubic spline segment passing through two end points A (0, 5) and B (10, 20), having a slope of 2 and a curvature of -0.5 at A. Equation for cubic spline is:

*asked on January 21, 2007* -
## Math

In a given city there are 28 reporters of which 16 are men. If the committee of 4 reporters is to be formed A. How many different committees can be formed? B. How many different committees contain 3 men? C. How many different commitrees contain at least 2

*asked on March 2, 2018* -
## Calculus

Evaluate the integral: the integral of the cube root of x, dx. a. (3/4)x^(4/3)+C b. (3/2)x^(2/3)+C c. 1/(3x^(2/3))+C d. None of these I got (3x^(4/3)/4)+C. I was wondering if it would be D.

*asked on February 23, 2017* -
## Organic Chemistry

Draw all the possible conformations for the following compounds and rank their stability (#1 least stable). a) 3-chloro-2-methylpentane rotating between c-3 and c-4 b) 1-cyclopropyl-2-flurocyclohexane

*asked on February 19, 2017* -
## Organic Chemistry

Draw only the different stereoisomers for the following compounds: a) 2,4-diiodohexane b) 1-s-butyl-3ethylcycloheptane

*asked on February 19, 2017* -
## Biology - Lungs

Why are there so many bronchioles in the body?

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

where does the parenthesis go on the equation 5x(3+2)-2+5x3=4

*asked on January 6, 2016* -
## Algebra 2

So I solved this problem but, strange as it sounds, I don't know how to do the work. Here's the question: One number is eight less than another number. The sum of the numbers is eighty. Find both numbers. Here's what I've got: y-8=x x+y=80 x=36 y=44 I

*asked on October 17, 2015* -
## pol

In Marbury v. Madison, the Supreme Court established the principle of constitutional review by

*asked on January 25, 2015* -
## pol

Article III of the Constitution establishes that

*asked on January 25, 2015* -
## physics

A baseball is hit at a height of 1.1 m with an unknown initial velocity at 38 ° above the horizontal. It just clears a barrier of height 36.1 m at a horizontal distance of 63.0 m. Find: a) the initial speed;

*asked on October 7, 2013* -
## TO MS SUE

Also Ms.Sue can you try and find me food web of the organsims affected my copper because I also need that in my project. A picture woule be great.

*asked on February 27, 2013* -
## TO MS SUE

ms sue I got most of the answers but im stuck on this one, can you just tell me the answer, it will save my time and help me A LOT : what organisms are affected by copper? this is all i need, thanks :)

*asked on February 27, 2013* -
## SCIENCE

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

*asked on February 27, 2013* -
## SCIENCE URGENT HELP

what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by

*asked on February 26, 2013*

## Pages

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