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 ...

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.)

math
Its on the ellipse. Google isn't helping.

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

organic chemistry

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

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?

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?

College Algebra
40 peanuts and 60 walnuts

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.

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...

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 ...

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 ...

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 ...

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 ...

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-...

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 ...

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.

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

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.

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...

chemistry
Which of the isotopes of hydrogen is radioactive

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.

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.

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

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?

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)

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

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

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?

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

Geometry
hmm

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?

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

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 ...

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

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?

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? ________%

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

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

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

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

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

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 ...

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 ...

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

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

calculus
find the differentiate y=cscx/ãx

chemistry prt 3
What is the net ionic equation of the reaction of MgSO4 with NaOH

chemistry prt 2
What is the net ionic equation of the reaction of MgCl2 with NaOH

chemistry
iight thanx

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