# Posts by EJ

Total # Posts: 56

**Statistics**

in a medical examination, 300 people undergo a height measurement and was found out that the average height of all are 150cm. if the standard deviation is 19, find the number of people that fall under the given conditions: a)with the height less than 132cm. b)with height from ...

*January 10, 2017*

**Analytic Geometry**

Find the coordinates of the foci, the ends of major and minor axis, the ends of latus rectum then sketch the graph of y^2/169 + x^2/144 =1 (i need the anwers to that i will have an idea on how to solve the remaining ass.)

*April 20, 2016*

**math**

Its on the ellipse. Google isn't helping.

*April 20, 2016*

**math**

Wha is a vertex, a focus, an eccentricity, and a latus rectum

*April 20, 2016*

**organic chemistry**

please

*July 28, 2015*

**organic chemistry**

is 2-pentene a cis or trans? and why? Cis- atleast 2 bulky grps.. Trans-3-4 bulky grps.. cis and trans must contain a double bond. i don't know if its a cis or trans so please enlighten me

*July 28, 2015*

**science**

Darren the astronaut traveled to Planet U-427, a planet that is as big as Earth but is half the mass of Earth. What can you say about Darren's weight in this planet?

*June 17, 2015*

**science**

Darren the astronaut traveled to Planet U-427, a planet that is as big as Earth but is half the mass of Earth. What can you say about Darren's weight in this planet?

*June 17, 2015*

**College Algebra**

40 peanuts and 60 walnuts

*February 3, 2015*

**physics**

How much heat must be removed from 456 g of water at 25.0°C to change it into ice at -10.0°C? The specific heat of ice is 2090 J/kg ∙ K, the latent heat of fusion of water is 33.5 × 104 J/kg, and the specific heat of water is 4186 J/kg ∙ K.

*January 25, 2015*

**Managerial Economics**

Two competing hospitals in small city can choose whether to offer only basic health care, all- purpose care, or specialized care. The following payoff table denotes profits for each hospital: Hospital B's Services Hospital A's Services Basic All-Purpose Specialty Basic...

*December 2, 2014*

**Managerial Economics**

Since dry cleaning produces air pollution, a small town with two dry cleaning companies has decided to regulate the dry cleaning industry. The two dry cleaning companies, Company A and Company B, currently produce 350 units of air pollution, which the town wants to reduce to ...

*December 2, 2014*

**Managerial Economics**

Problem 1 (50 points) The city of San Diego is considering extending the trolley (the downtown mass transit train) 11 miles from Old Town up to La Jolla. The cost of construction would be $1.7 billion. The estimated ridership along the new section is 18 thousand per day work ...

*December 2, 2014*

**Economics**

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 - 3P, where Q is the ...

*November 22, 2014*

**Economics**

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 - 3P, where Q is the ...

*November 22, 2014*

**Economics**

A city must decide whether to build a downtown parking garage and what rate to charge. It is considering two rates: a flat $1.50-per-hour rate or an all-day rate averaging $1 per hour (based on a $10 daily rate and an average 10-hour stay). Parking demand is given by Q = 900-...

*November 22, 2014*

**Quantitative Methods**

7) President’s job approval rating is frequently reported in news programs. You will hear statements such as: “Among likely voters, the President’s job approval rating is 46% with a margin of error of 6%.” a) What percent confidence interval do you think ...

*November 21, 2014*

**CHEMISTRY**

how many grams of glucose, C6H12O6 and water are in 600g of 5.5% by mass glucose solution? please indicate the general formula to use to solve this problem.

*October 11, 2014*

**physics**

If you travel 10 m [E], 25 m [S], 12 m [W] and 25 m [N], your displacement is

*July 31, 2014*

**math**

an insurance company reported that 55% of all automobile damage claims were made by people under age 25. If six automobile damage claims were selected at random, determine the probility that exactly four of them were made by someone under ager 25.

*May 17, 2014*

**Chemistry**

Consider the following hypothetical nuclear breakdown: Fermium-258 (Fm-258) loses three alpha particles and two neutrons. What is the new element that is formed (in terms of chemical symbol, atomic number and atomic mass)? I'm not sure how to express this in equation form...

*March 18, 2014*

**chemistry**

Which of the isotopes of hydrogen is radioactive

*March 6, 2014*

**trigonometry**

a yardstick, held vertically on a level surface, cast a shadow 1 foot 8 inch long. Find the tangent of the angles that the rays of the sun make with the horizontal.

*June 20, 2013*

**calculus**

a right triangle is formed in the first quadrant by the x- and y- axes and a line through the point (1,2). write the length of the hypotenuse as a function of x. find the vertices of the triangle such that its area is a minimum.

*March 17, 2013*

**math**

How much interest would a person have to pay on a $3250 loan at 5% for three years??

*January 30, 2013*

**physics**

a sprinter accelerates from rest to 10 m/s in 1.3s. What is her acceleration a) in m/s^2> b) km/n^2?

*September 18, 2012*

**physics**

At highway speed, a particular car is capable of an acceleration of about 1.7m/s^2.At this rate how long does it take to accelerate from 90 km/h to 110 km/h? (in seconds)

*September 18, 2012*

**physics**

A sports car accelerates from rest to 100 km/h in 6.25. What is the acceleration in m/s^2?

*September 18, 2012*

**math**

what is 9y to the 18 power divided by15y to the2 power

*August 28, 2012*

**algebra**

sue nees to find the length & width of a room. the room is 4 meters longer then it is wide. its perimeter is 24 meters. what is the width?

*June 12, 2012*

**physics**

When the mover pushes the box, two equal forces result. Explain why the box moves even though the forces are equal and opposite

*May 8, 2012*

**Geometry**

hmm

*May 1, 2012*

**geometry**

Two sides of an equilateral triangle are 3x +15 and x + 21. Which of the following could be the measure of the third side?

*April 26, 2012*

**CHEMISTRY**

HOW MUCH 1 MOLE HCL IS REQUIRED TO MAKE 250ML OF 0.1 MOLE HCL

*March 13, 2012*

**logic and design**

You have been contracted by a local antique store to design an algorithm determining the total purchases and sales tax. According to the store owner, the user will need to see the subtotal, the sales tax amount, and the total purchase amount. A customer is purchasing four ...

*January 15, 2012*

**chs**

If a pitcher threw a baseball straight up at 32 meters per second, what was the ball's velocity after 2.5 seconds?

*November 12, 2011*

**chemistry**

If you used 0.155 mL of acetic anhydride, and 0.169 g of p-aminophenol what was the limiting reagent? Choice is either: 1. acetic anhydride or 2. p-aminophenol ________mol? How many moles of the non-limiting reageant remained after the reaction was complete?

*October 19, 2011*

**chemistry**

If you used 0.155 mL of acetic anhydride, and 0.165 g of p-aminophenol what was your theoretical yield of acetaminophen? ___________g If you recovered 0.173 g of acetaminophen, what was your percent yield? ________%

*October 19, 2011*

**trig**

csc^2x secx/sec^2x+csc^2x

*May 17, 2011*

**Statistics**

The linear correlation coefficient, r, is a numerical measure of the strength of the relationship between two variables representing quantitative data.

*May 17, 2011*

**Applied Physics**

A car is traveling at 20 meters per second. The driver steps on the brake. The car is in equilibrium

*May 14, 2011*

**Applied Physics**

An object is dropped from a height of 49 meters. The object takes 3.2s to hit the ground. The final velocity of the object when it hits the ground is -31 m/s

*May 14, 2011*

**Applied Physics**

The velocity of an object is +47 meters per second at 3.0 seconds and is +65 meters per second at 12.0 seconds. The average acceleration of the object is 2.0 m/s to the fourth power

*May 14, 2011*

**Applied Physics**

A 10 kilogram object subjected to a 20 Newton force moves across a horizontal frictionless surface in the direction of the force. Before the force was applied, the speed of the object was 2.0 meters/second. When the force is removed the object is traveling at 6.0 meters per ...

*May 14, 2011*

**Math**

1. In this problem, we analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open market. Often, the demand ...

*April 17, 2011*

**geometry**

What is the perimeter of the isosceles triangle shown below? If necessary, round to the nearest hundredth.

*March 4, 2011*

**Chem**

In acidic solution MnO4- oxidizes H3AsO3, a weak acid, to H3AsO4, a weak acid, and is reduced to Mn2+. Write the balanced net ionic equation for this reaction. How many H+ are there in the balanced equation? Question 8 answers

*February 22, 2011*

**calculus**

find the differentiate y=cscx/ãx

*October 13, 2010*

**chemistry prt 3**

What is the net ionic equation of the reaction of MgSO4 with NaOH

*October 11, 2010*

**chemistry prt 2**

What is the net ionic equation of the reaction of MgCl2 with NaOH

*October 11, 2010*

**chemistry**

iight thanx

*October 11, 2010*

**chemistry**

Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate

*October 11, 2010*

**5th grade**

Stlemoiet

*December 19, 2009*

**english**

in this sentence is on a verb (new sleds raced on the hill.)

*October 27, 2009*

**SCI**

You know just because someone asks someone else for help doesn't mean that they are wanting to do their homework for them. Why don't ya'll check yourselves and learn some damn manners and learn to help others

*January 13, 2008*

**math**

ratio in simplest form 400 centimeters to 1 meter 1 400:1 cm/m

*October 30, 2006*

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