Wednesday
October 1, 2014

Posts by jam


Total # Posts: 41

Trigonometry
Oh ok! but I can't seem to understand the "sin 50 = h/7 h = 5.36" part. Is that a formula of getting the height?
August 2, 2014

Trigonometry
how did you get the angles in b.)?
August 2, 2014

Trigonometry
Wow that was fast! Thank you so much! :)
August 2, 2014

Trigonometry
Two observers who are 2 miles apart on a horizontal plane observe a balloon in a same vertical plane with themselves. the angles of elevation are 50 degrees and 65 degrees respectively. find the height of the balloon,(a)if it is between the observers;(b)if it is on the same ...
August 2, 2014

math
five friends plan a chess tournament. how many possible games can be played if each person plays with each other person exactly once.
June 19, 2014

Math
Solve for the inequality: 1/3^x (1/3^x - 2) < 15 I know the answer is x > - (log 5/log 3), can someone explain me how?
May 10, 2014

Statistics
75.3033 is the answer
August 17, 2013

Physics
A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after the collision? assume ...
August 14, 2013

math calculus (please help me)
In 1970, the total enrollment in public universities and colleges in a country was 5.1 million students. By 2004, enrollment had risen to 14.3 million students. Assume enrollment can be modeled by exponential growth. (a) Estimate the total enrollments in 1980, 1990, and 2000...
May 18, 2013

Grade 12 Calculus
Determine the absolute extrema of each function on the given interval. Illustrate your results by sketching the graph of each function. a)  =  − 4 + 3 , 0 ≤  ≤ 3 b)  =  − 1 , 0 ≤ &#...
April 15, 2013

umuc
Discuss qualitative and quantitative test you would perform to detect or quantify monosaccharides in solutio. Discuss the chemical basis of the tests.
February 12, 2013

umuc
Draw and name the different structural forms of L-fructose that would exist in aqueous solutions
February 12, 2013

Biostatistic
The following replicate calcium determinations on a blood sample using atomic absorption spectrophotometry (AAS) and a new colorimetric method were reported. Is there a significant difference in the precision of the two methods?
December 20, 2012

Biostatistic
An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same sample is analyzed several times by both methods with the following results (% ethanol). Enzymatic method: 13.1, 12.7, 12.6, 13.3, 13.3. GC method: 13...
December 20, 2012

Chemistry
Calculate the heat needed at 0 degrees Celsius in each of the following: joules to melt 65.0g of ice
January 10, 2012

physics
A parallel plate capacitor has square plates of side L= 12 cm and a distance d= 2 cm between the plates. Half of the capacitor areae is filled with a dielectric with k1 = 35. the other half is filled with a different dielectric with k2 = 8. The effective( equivalent ...
November 22, 2011

physics
A 2.0 nF parallel plate capacitor with a sheet of mylar (k= 3.1) filling the space between the plates is charged to a potential difference of 90 V and is them disconnected. How much work would be required to completely remove the sheet of mylar from the space between the two ...
November 22, 2011

Math
"Solving a system involving three unknowns." We're supposed to use substitution or elimination. 3d+e-2f=-14 2d-3e+4f=-23 5d+4e-10f=-13
May 17, 2011

chemistry
I understand what you're saying, but in my text book it says a buffer is a weak acid or base with its salt, so is that not always true?
May 12, 2011

chemistry
So then the common answer for any titration with a strong acid there is no buffering/buffer region?
May 12, 2011

chemistry
it doesn't right because for like HCl it doesn't really have a Ka?
May 12, 2011

chemistry
so in strong acid strong base titration does the pH=pkA?
May 12, 2011

chemistry
Do strong acid strong base titrations have a buffer region?
May 12, 2011

ORGANIC CHEM I
hOW MANY POSSIBLE STEREOISOMERS DOES MENTHOL HAVE ?
April 11, 2011

ORGANIC CHEM I
A PROCESS THAT INVOLVES SYMMETRICAL BOND BREAKING AND BOND MAKING IS A(AN) ?
April 11, 2011

algebra
Write the equation in y=mx+b form. Find the equation of the line that passes through the points (8,-15) and (-2,5) I am unable to get this answer!
February 21, 2011

math
2/x+3 = o solve for x. Is this where I go: 2= 0 x+3=0?
February 21, 2011

math
x-2y= -5 2x+y= -5
February 20, 2011

algebra
How long will it take a car traveling at 60 mph to overtake a bus traveling at 40 mph if the bus had a 1.5 hour head start?
February 20, 2011

algebra
A train can travel 280 miles in the same time that it takes a car to travel 140 miles. If the train's rate is 40 miles per hour faster than the cars, find the average for each.
February 20, 2011

problem solving
The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 21 minutes requires 12.6 gallons of water. Find the amount of water used for a shower lasting 10 minutes.
February 20, 2011

Algebra
There are 220 calories per 32 grams of cereal mix. Find how many calories are in 55 grams of the cereal mix.
February 20, 2011

social studies
what aspects of a fast food restaurant would interest sociologists
February 18, 2011

Chemistry
First you multiply 10.0 with 540cal/1 g of H2O. To calculate the amount of heat added to (or removed from) a sample of water, the mass of the sample is mulitipled by the heat of vaporization, which is 2260. As before, no temperature change occurs during a change of state. the ...
January 19, 2011

math subject
make (a) the subject 2a+squareroot of 2a^2=10
September 28, 2010

math subject
help
September 28, 2010

math subject
make (a) the subject 2a+ã2a^2=10 please and thank you (the 2a^2 is all spuare rooted)
September 28, 2010

math
5:05-1hr= 4:05 4:05-15mins =3:50 bcuz: 15mins can't be substracted from 5mins so u cross the hr 4 to 3 then add 5mins to 60mins to get 65mins, and then u minus 15mins to get 50mins so the answer will be 3:50 and not 3:55.
May 5, 2010

accounting
750,000
September 27, 2009

French
I want to ask is it Je suis etudiante or Je suis une etudiante?
January 25, 2008

French
Are my sentences correct? I am japanese and I am also canadian. Je suis japonaise et je suis canadienne aussi. I am a student at university. Je suis une etudiante a l'universite. I live in richmond, a city in Canada. J'habite a richmond, une ville au Canada. I like to ...
January 25, 2008

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